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VIII AMERICAN GLIDING EXPERIMENTS
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While Pilcher was carrying on Lilienthal’s work in England, the great German had also a follower1 in America; one Octave Chanute, who, in one of the statements which he has left on the subject of his experiments acknowledges forty years’ interest in the problem of flight, did more to develop the glider3 in America than—with the possible exception of Montgomery—any other man. Chanute had all the practicality of an American; he began his work, so far as actual gliding4 was concerned, with a full-sized glider of the Lilienthal type, just before Lilienthal was killed. In a rather rare monograph5, entitled Experiments in Flying, Chanute states that he found the Lilienthal glider hazardous6 and decided7 to test the value of an idea of his own; in this he followed the same general method, but reversed the principle upon which Lilienthal had depended for maintaining his equilibrium8 in the air. Lilienthal had shifted the weight of his body, under immovable wings, as fast and as far as the sustaining pressure varied9 under his surfaces; this shifting was mainly done by moving the feet, as the actions required were small except when alighting. Chanute’s idea was to have the operator remain seated in the machine in the air, and to intervene only to steer10 or to alight; moving mechanism11 was provided to adjust the wings108 automatically, in order to restore balance when necessary.

Chanute realised that experiments with models were of little use; in order to be fully12 instructive, these experiments should be made with a full-sized machine which carried its operator, for models seldom fly twice alike in the open air, and no relation can be gained from them of the divergent air currents which they have experienced. Chanute’s idea was that any flying machine which might be constructed must be able to operate in a wind; hence the necessity for an operator to report upon what occurred in flight, and to acquire practical experience of the work of the human factor in imitation of bird flight. From this point of view he conducted his own experiments; it must be noted13 that he was over sixty years of age when he began, and, being no longer sufficiently14 young and active to perform any but short and insignificant15 glides16, the courage of the man becomes all the more noteworthy; he set to work to evolve the state required by the problem of stability, and without any expectation of advancing to the construction of a flying machine which might be of commercial value. His main idea was the testing of devices to secure equilibrium; for this purpose he employed assistants to carry out the practical work, where he himself was unable to supply the necessary physical energy.

Together with his assistants he found a suitable place for experiments among the sandhills on the shore of Lake Michigan, about thirty miles eastward17 from Chicago. Here a hill about ninety-five feet high was selected as a point from which Chanute’s gliders18 could set off; in practice, it was found that the best observation109 was to be obtained from short glides at low speed, and, consequently, a hill which was only sixty-one feet above the shore of the lake was employed for the experimental work done by the party.

In the years 1896 and 1897, with parties of from four to six persons, five full-sized gliders were tried out, and from these two distinct types were evolved: of these one was a machine consisting of five tiers of wings and a steering19 tail, and the other was of the biplane type; Chanute believed these to be safer than any other machine previously20 evolved, solving, as he states in his monograph, the problem of inherent equilibrium as fully as this could be done. Unfortunately, very few photographs were taken of the work in the first year, but one view of a multiple wing-glider survives, showing the machine in flight. In 1897 a series of photographs was taken exhibiting the consecutive21 phases of a single flight; this series of photographs represents the experience gained in a total of about one thousand glides, but the point of view was varied so as to exhibit the consecutive phases of one single flight.

The experience gained is best told in Chanute’s own words. ‘The first thing,’ he says, ‘which we discovered practically was that the wind flowing up a hill-side is not a steadily-flowing current like that of a river. It comes as a rolling mass, full of tumultuous whirls and eddies22, like those issuing from a chimney; and they strike the apparatus23 with constantly varying force and direction, sometimes withdrawing support when most needed. It has long been known, through instrumental observations, that the wind is constantly changing in force and direction; but it needed the experience of an operator afloat on a gliding machine110 to realise that this all proceeded from cyclonic24 action; so that more was learned in this respect in a week than had previously been acquired by several years of experiments with models. There was a pair of eagles, living in the top of a dead tree about two miles from our tent, that came almost daily to show us how such wind effects are overcome and utilised. The birds swept in circles overhead on pulseless wings, and rose high up in the air. Occasionally there was a side-rocking motion, as of a ship rolling at sea, and then the birds rocked back to an even keel; but although we thought the action was clearly automatic, and were willing to learn, our teachers were too far off to show us just how it was done, and we had to experiment for ourselves.’

Chanute provided his multiple glider with a seat, but, since each glide2 only occupied between eight and twelve seconds, there was little possibility of the operator seating himself. With the multiple glider a pair of horizontal bars provided rest for the arms, and beyond these was a pair of vertical26 bars which the operator grasped with his hands; beyond this, the operator was in no way attached to the machine. He took, at the most, four running steps into the wind, which launched him in the air, and thereupon he sailed into the wind on a generally descending28 course. In the matter of descent Chanute observed the sparrow and decided to imitate it. ‘When the latter,’ he says, ‘approaches the street, he throws his body back, tilts29 his outspread wings nearly square to the course, and on the cushion of air thus encountered he stops his speed and drops lightly to the ground. So do all birds. We tried it with misgivings31, but found it perfectly32 effective. The soft sand was a111 great advantage, and even when the experts were racing33 there was not a single sprained34 ankle.’

With the multiple winged glider some two to three hundred glides were made without any accident either to the man or to the machine, and the action was found so effective, the principle so sound, that full plans were published for the benefit of any experimenters who might wish to improve on this apparatus. The American Aeronautical35 Annual for 1897 contains these plans; Chanute confessed that some movement on the part of the operator was still required to control the machine, but it was only a seventh or a sixth part of the movement required for control of the Lilienthal type.

Chanute waxed enthusiastic over the possibilities of gliding, concerning which he remarks that ‘There is no more delightful36 sensation than that of gliding through the air. All the faculties37 are on the alert, and the motion is astonishingly smooth and elastic38. The machine responds instantly to the slightest movement of the operator; the air rushes by one’s ears; the trees and bushes flit away underneath39, and the landing comes all too quickly. Skating, sliding, and bicycling are not to be compared for a moment to aerial conveyance40, in which, perhaps, zest41 is added by the spice of danger. For it must be distinctly understood that there is constant danger in such preliminary experiments. When this hazard has been eliminated by further evolution, gliding will become a most popular sport.’

Later experiments proved that the biplane type of glider gave better results than the rather cumbrous model consisting of five tiers of planes. Longer and more numerous glides, to the number of seven to eight hundred, were obtained, the rate of descent being112 about one in six. The longest distance traversed was about 120 yards, but Chanute had dreams of starting from a hill about 200 feet high, which would have given him gliding flights of 1,200 feet. He remarked that ‘In consequence of the speed gained by running, the initial stage of the flight is nearly horizontal, and it is thrilling to see the operator pass from thirty to forty feet overhead, steering his machine, undulating his course, and struggling with the wind-gusts42 which whistle through the guy wires. The automatic mechanism restores the angle of advance when compromised by variations of the breeze; but when these come from one side and tilt30 the apparatus, the weight has to be shifted to right the machine ... these gusts sometimes raise the machine from ten to twenty feet vertically43, and sometimes they strike the apparatus from above, causing it to descend27 suddenly. When sailing near the ground, these vicissitudes44 can be counteracted45 by movements of the body from three to four inches; but this has to be done instantly, for neither wings nor gravity will wait on meditation46. At a height of three hundred or four hundred feet the regulating mechanism would probably take care of these wind-gusts, as it does, in fact, for their minor47 variations. The speed of the machine is generally about seventeen miles an hour over the ground, and from twenty-two to thirty miles an hour relative to the air. Constant effort was directed to keep down the velocity48, which was at times fifty-two miles an hour. This is the purpose of the starting and gliding against the wind, which thus furnishes an initial velocity without there being undue49 speed at the landing. The highest wind we dared to experiment in blew at thirty-one miles an hour; when the113 wind was stronger, we waited and watched the birds.’

Chanute details an amusing little incident which occurred in the course of experiment with the biplane glider. He says that ‘We had taken one of the machines to the top of the hill, and loaded its lower wings with sand to hold it while we went to lunch. A gull50 came strolling inland, and flapped full-winged to inspect. He swept several circles above the machine, stretched his neck, gave a squawk and went off. Presently he returned with eleven other gulls51, and they seemed to hold a conclave52 about one hundred feet above the big new white bird which they had discovered on the sand. They circled round after round, and once in a while there was a series of loud peeps, like those of a rusty53 gate, as if in conference, with sudden flutterings, as if a terrifying suggestion had been made. The bolder birds occasionally swooped54 downwards55 to inspect the monster more closely; they twisted their heads around to bring first one eye and then the other to bear, and then they rose again. After some seven or eight minutes of this performance, they evidently concluded either that the stranger was too formidable to tackle, if alive, or that he was not good to eat, if dead, and they flew off to resume fishing, for the weak point about a bird is his stomach.’

The gliders were found so stable, more especially the biplane form, that in the end Chanute permitted amateurs to make trials under guidance, and throughout the whole series of experiments not a single accident occurred. Chanute came to the conclusion that any young, quick, and handy man could master a gliding machine almost as soon as he could get the hang of a114 bicycle, although the penalty for any mistake would be much more severe.

At the conclusion of his experiments he decided that neither the multiple plane nor the biplane type of glider was sufficiently perfected for the application of motive56 power. In spite of the amount of automatic stability that he had obtained he considered that there was yet more to be done, and he therefore advised that every possible method of securing stability and safety should be tested, first with models, and then with full-sized machines; designers, he said, should make a point of practice in order to make sure of the action, to proportion and adjust the parts of their machine, and to eliminate hidden defects. Experimental flight, he suggested, should be tried over water, in order to break any accidental fall; when a series of experiments had proved the stability of a glider, it would then be time to apply motive power. He admitted that such a process would be both costly57 and slow, but, he said, that ‘it greatly diminished the chance of those accidents which bring a whole line of investigation58 into contempt.’ He saw the flying machine as what it has, in fact, been; a child of evolution, carried on step by step by one investigator59 after another, through the stages of doubt and perplexity which lie behind the realm of possibility, beyond which is the present day stage of actual performance and promise of ultimate success and triumph over the earlier, more cumbrous, and slower forms of the transport that we know.
Chanute biplane glider.

Chanute’s monograph, from which the foregoing notes have been comprised, was written soon after the conclusion of his series of experiments. He does not appear to have gone in for further practical work, but115 to have studied the subject from a theoretical view-point and with great attention to the work done by others. In a paper contributed in 1900 to the American Independent, he remarks that ‘Flying machines promise better results as to speed, but yet will be of limited commercial application. They may carry mails and reach other inaccessible60 places, but they cannot compete with railroads as carriers of passengers or freight. They will not fill the heavens with commerce, abolish custom houses, or revolutionise the world, for they will be expensive for the loads which they can carry, and subject to too many weather contingencies61. Success is, however, probable. Each experimenter has added something to previous knowledge which his successors can avail of. It now seems likely that two forms of flying machines, a sporting type and an exploration type, will be gradually evolved within one or two generations, but the evolution will be costly and slow, and must be carried on by well-equipped and thoroughly62 informed scientific men; for the casual inventor, who relies upon one or two happy inspirations, will have no chance of success whatever.’

Follows Professor John J. Montgomery, who, in the true American spirit, describes his own experiments so well that nobody can possibly do it better. His account of his work was given first of all in the American Journal, Aeronautics63, in January, 1909, and thence transcribed64 in the English paper of the same name in May, 1910, and that account is here copied word for word. It may, however, be noted first that as far back as 1860, when Montgomery was only a boy, he was attracted to the study of aeronautical problems, and in 1883 he built his first machine, which was of116 the flapping-wing ornithopter type, and which showed its designer, with only one experiment, that he must design some other form of machine if he wished to attain65 to a successful flight. Chanute details how, in 1884 and 1885, Montgomery built three gliders, demonstrating the value of curved surfaces. With the first of these gliders Montgomery copied the wing of a seagull; with the second he proved that a flat surface was virtually useless, and with the third he pivoted66 his wings as in the Antoinette type of power-propelled aeroplane, proving to his own satisfaction that success lay in this direction. His own account of the gliding flights carried out under his direction is here set forth67, being the best description of his work that can be obtained:—

‘When I commenced practical demonstration68 in my work with aeroplanes I had before me three points; first, equilibrium; second, complete control; and third, long continued or soaring flight. In starting I constructed and tested three sets of models, each in advance of the other in regard to the continuance of their soaring powers, but all equally perfect as to equilibrium and control. These models were tested by dropping them from a cable stretched between two mountain tops, with various loads, adjustments and positions. And it made no difference whether the models were dropped upside down or any other conceivable position, they always found their equilibrium immediately and glided69 safely to earth.

‘Then I constructed a large machine patterned after the first model, and with the assistance of three cowboy friends personally made a number of flights in the steep mountains near San Juan (a hundred miles117 distant). In making these flights I simply took the aeroplane and made a running jump. These tests were discontinued after I put my foot into a squirrel hole in landing and hurt my leg.

The following year I commenced the work on a larger scale, by engaging aeronauts to ride my aeroplane dropped from balloons. During this work I used five hot-air balloons and one gas balloon, five or six aeroplanes, three riders—Maloney, Wilkie, and Defolco—and had sixteen applicants70 on my list, and had a training station to prepare any when I needed them.

‘Exhibitions were given in Santa Cruz, San Jose, Santa Clara, Oakland, and Sacramento. The flights that were made, instead of being haphazard71 affairs, were in the order of safety and development. In the first flight of an aeronaut the aeroplane was so arranged that the rider had little liberty of action, consequently he could make only a limited flight. In some of the first flights, the aeroplane did little more than settle in the air. But as the rider gained experience in each successive flight I changed the adjustments, giving him more liberty of action, so he could obtain longer flights and more varied movements in the flights. But in none of the flights did I have the adjustments so that the riders had full liberty, as I did not consider that they had the requisite72 knowledge and experience necessary for their safety; and hence, none of my aeroplanes were launched so arranged that the rider could make adjustments necessary for a full flight.

‘This line of action caused a good deal of trouble with aeronauts or riders, who had unbounded confidence and wanted to make long flights after the first few trials; but I found it necessary, as they seemed slow118 in comprehending the important elements and were willing to take risks. To give them the full knowledge in these matters I was formulating73 plans for a large starting station on the Mount Hamilton Range from which I could launch an aeroplane capable of carrying two, one of my aeronauts and myself, so I could teach him by demonstration. But the disasters consequent on the great earthquake completely stopped all my work on these lines. The flights that were given were only the first of the series with aeroplanes patterned after the first model. There were no aeroplanes constructed according to the two other models, as I had not given the full demonstration of the workings of the first, though some remarkable74 and startling work was done. On one occasion Maloney, in trying to make a very short turn in rapid flight, pressed very hard on the stirrup which gives a screw-shape to the wings, and made a side somersault. The course of the machine was very much like one turn of a corkscrew. After this movement the machine continued on its regular course. And afterwards Wilkie, not to be outdone by Maloney, told his friends he would do the same, and in a subsequent flight made two side somersaults, one in one direction and the other in an opposite, then made a deep dive and a long glide, and, when about three hundred feet in the air, brought the aeroplane to a sudden stop and settled to the earth. After these antics, I decreased the extent of the possible change in the form of wing-surface, so as to allow only straight sailing or only long curves in turning.

‘During my work I had a few carping critics that I silenced by this standing75 offer: If they would deposit a thousand dollars I would cover it on this proposition.119 I would fasten a 150 pound sack of sand in the rider’s seat, make the necessary adjustments, and send up an aeroplane upside down with a balloon, the aeroplane to be liberated76 by a time fuse. If the aeroplane did not immediately right itself, make a flight, and come safely to the ground, the money was theirs.

‘Now a word in regard to the fatal accident. The circumstances are these: The ascension was given to entertain a military company in which were many of Maloney’s friends, and he had told them he would give the most sensational77 flight they ever heard of. As the balloon was rising with the aeroplane, a guy rope dropping switched around the right wing and broke the tower that braced78 the two rear wings and which also gave control over the tail. We shouted Maloney that the machine was broken, but he probably did not hear us, as he was at the same time saying, “Hurrah for Montgomery’s airship,” and as the break was behind him, he may not have detected it. Now did he know of the breakage or not, and if he knew of it did he take a risk so as not to disappoint his friends? At all events, when the machine started on its flight the rear wings commenced to flap (thus indicating they were loose), the machine turned on its back, and settled a little faster than a parachute. When we reached Maloney he was unconscious and lived only thirty minutes. The only mark of any kind on him was a scratch from a wire on the side of his neck. The six attending physicians were puzzled at the cause of his death. This is remarkable for a vertical descent of over 2,000 feet.’

The flights were brought to an end by the San Francisco earthquake in April, 1906, which, Montgomery states, ‘Wrought such a disaster that I had to turn my120 attention to other subjects and let the aeroplane rest for a time.’ Montgomery resumed experiments in 1911 in California, and in October of that year an accident brought his work to an end. The report in the American Aeronautics says that ‘a little whirlwind caught the machine and dashed it head on to the ground; Professor Montgomery landed on his head and right hip25. He did not believe himself seriously hurt, and talked with his year-old bride in the tent. He complained of pains in his back, and continued to grow worse until he died.’

点击收听单词发音收听单词发音  

1 follower gjXxP     
n.跟随者;随员;门徒;信徒
参考例句:
  • He is a faithful follower of his home football team.他是他家乡足球队的忠实拥护者。
  • Alexander is a pious follower of the faith.亚历山大是个虔诚的信徒。
2 glide 2gExT     
n./v.溜,滑行;(时间)消逝
参考例句:
  • We stood in silence watching the snake glide effortlessly.我们噤若寒蝉地站着,眼看那条蛇逍遥自在地游来游去。
  • So graceful was the ballerina that she just seemed to glide.那芭蕾舞女演员翩跹起舞,宛如滑翔。
3 glider wgNxU     
n.滑翔机;滑翔导弹
参考例句:
  • The glider was soaring above the valley.那架滑翔机在山谷上空滑翔。
  • The pilot managed to land the glider on a safe place.那个驾驶员设法让滑翔机着陆到一个安全的地方。
4 gliding gliding     
v. 滑翔 adj. 滑动的
参考例句:
  • Swans went gliding past. 天鹅滑行而过。
  • The weather forecast has put a question mark against the chance of doing any gliding tomorrow. 天气预报对明天是否能举行滑翔表示怀疑。
5 monograph 2Eux4     
n.专题文章,专题著作
参考例句:
  • This monograph belongs to the category of serious popular books.这本专著是一本较高深的普及读物。
  • It's a monograph you wrote six years ago.这是你六年前写的的专论。
6 hazardous Iddxz     
adj.(有)危险的,冒险的;碰运气的
参考例句:
  • These conditions are very hazardous for shipping.这些情况对航海非常不利。
  • Everybody said that it was a hazardous investment.大家都说那是一次危险的投资。
7 decided lvqzZd     
adj.决定了的,坚决的;明显的,明确的
参考例句:
  • This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
  • There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
8 equilibrium jiazs     
n.平衡,均衡,相称,均势,平静
参考例句:
  • Change in the world around us disturbs our inner equilibrium.我们周围世界的变化扰乱了我们内心的平静。
  • This is best expressed in the form of an equilibrium constant.这最好用平衡常数的形式来表示。
9 varied giIw9     
adj.多样的,多变化的
参考例句:
  • The forms of art are many and varied.艺术的形式是多种多样的。
  • The hotel has a varied programme of nightly entertainment.宾馆有各种晚间娱乐活动。
10 steer 5u5w3     
vt.驾驶,为…操舵;引导;vi.驾驶
参考例句:
  • If you push the car, I'll steer it.如果你来推车,我就来驾车。
  • It's no use trying to steer the boy into a course of action that suits you.想说服这孩子按你的方式行事是徒劳的。
11 mechanism zCWxr     
n.机械装置;机构,结构
参考例句:
  • The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
  • The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
12 fully Gfuzd     
adv.完全地,全部地,彻底地;充分地
参考例句:
  • The doctor asked me to breathe in,then to breathe out fully.医生让我先吸气,然后全部呼出。
  • They soon became fully integrated into the local community.他们很快就完全融入了当地人的圈子。
13 noted 5n4zXc     
adj.著名的,知名的
参考例句:
  • The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
  • Jim is noted for arriving late for work.吉姆上班迟到出了名。
14 sufficiently 0htzMB     
adv.足够地,充分地
参考例句:
  • It turned out he had not insured the house sufficiently.原来他没有给房屋投足保险。
  • The new policy was sufficiently elastic to accommodate both views.新政策充分灵活地适用两种观点。
15 insignificant k6Mx1     
adj.无关紧要的,可忽略的,无意义的
参考例句:
  • In winter the effect was found to be insignificant.在冬季,这种作用是不明显的。
  • This problem was insignificant compared to others she faced.这一问题与她面临的其他问题比较起来算不得什么。
16 glides 31de940e5df0febeda159e69e005a0c9     
n.滑行( glide的名词复数 );滑音;音渡;过渡音v.滑动( glide的第三人称单数 );掠过;(鸟或飞机 ) 滑翔
参考例句:
  • The new dance consists of a series of glides. 这种新舞蹈中有一连串的滑步。 来自《简明英汉词典》
  • The stately swan glides gracefully on the pond. 天鹅在池面上优美地游动。 来自《简明英汉词典》
17 eastward CrjxP     
adv.向东;adj.向东的;n.东方,东部
参考例句:
  • The river here tends eastward.这条河从这里向东流。
  • The crowd is heading eastward,believing that they can find gold there.人群正在向东移去,他们认为在那里可以找到黄金。
18 gliders a7deb46dbc14e35d759f16adee20c410     
n.滑翔机( glider的名词复数 )
参考例句:
  • The albatross is the king of gliders. 信天翁是滑翔鸟类之王。 来自《用法词典》
  • For three summers, may bested and improved their gliders. 他们花了三个夏天不断地测试、改进。 来自英汉非文学 - 科学史
19 steering 3hRzbi     
n.操舵装置
参考例句:
  • He beat his hands on the steering wheel in frustration. 他沮丧地用手打了几下方向盘。
  • Steering according to the wind, he also framed his words more amicably. 他真会看风使舵,口吻也马上变得温和了。
20 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
21 consecutive DpPz0     
adj.连续的,联贯的,始终一贯的
参考例句:
  • It has rained for four consecutive days.已连续下了四天雨。
  • The policy of our Party is consecutive.我党的政策始终如一。
22 eddies c13d72eca064678c6857ec6b08bb6a3c     
(水、烟等的)漩涡,涡流( eddy的名词复数 )
参考例句:
  • Viscosity overwhelms the smallest eddies and converts their energy into heat. 粘性制服了最小的旋涡而将其能量转换为热。
  • But their work appears to merge in the study of large eddies. 但在大旋涡的研究上,他们的工作看来却殊途同归。
23 apparatus ivTzx     
n.装置,器械;器具,设备
参考例句:
  • The school's audio apparatus includes films and records.学校的视听设备包括放映机和录音机。
  • They had a very refined apparatus.他们有一套非常精良的设备。
24 cyclonic ccbb49340e4eaefe06e7638172fcbc84     
adj.气旋的,飓风的
参考例句:
  • The anticyclone weather situations are more favorable than the cyclonic ones. 反气旋天气情况比气旋天气情况更有利些。 来自辞典例句
  • We studied the interaction between a typhoon and a cyclonic vortex. 研究一个台风涡旋和一个低压涡旋之间的相互作用。 来自互联网
25 hip 1dOxX     
n.臀部,髋;屋脊
参考例句:
  • The thigh bone is connected to the hip bone.股骨连着髋骨。
  • The new coats blouse gracefully above the hip line.新外套在臀围线上优美地打着褶皱。
26 vertical ZiywU     
adj.垂直的,顶点的,纵向的;n.垂直物,垂直的位置
参考例句:
  • The northern side of the mountain is almost vertical.这座山的北坡几乎是垂直的。
  • Vertical air motions are not measured by this system.垂直气流的运动不用这种系统来测量。
27 descend descend     
vt./vi.传下来,下来,下降
参考例句:
  • I hope the grace of God would descend on me.我期望上帝的恩惠。
  • We're not going to descend to such methods.我们不会沦落到使用这种手段。
28 descending descending     
n. 下行 adj. 下降的
参考例句:
  • The results are expressed in descending numerical order . 结果按数字降序列出。
  • The climbers stopped to orient themselves before descending the mountain. 登山者先停下来确定所在的位置,然后再下山。
29 tilts 0949a40cec67d3492b7f45f6f0f9f858     
(意欲赢得某物或战胜某人的)企图,尝试( tilt的名词复数 )
参考例句:
  • As the kitten touches it, it tilts at the floor. 它随着击碰倾侧,头不动,眼不动,还呆呆地注视着地上。 来自汉英文学 - 散文英译
  • The two writers had a number of tilts in print. 这两位作家写过一些文章互相攻击。
30 tilt aG3y0     
v.(使)倾侧;(使)倾斜;n.倾侧;倾斜
参考例句:
  • She wore her hat at a tilt over her left eye.她歪戴着帽子遮住左眼。
  • The table is at a slight tilt.这张桌子没放平,有点儿歪.
31 misgivings 0nIzyS     
n.疑虑,担忧,害怕;疑虑,担心,恐惧( misgiving的名词复数 );疑惧
参考例句:
  • I had grave misgivings about making the trip. 对于这次旅行我有过极大的顾虑。
  • Don't be overtaken by misgivings and fear. Just go full stream ahead! 不要瞻前顾后, 畏首畏尾。甩开膀子干吧! 来自《现代汉英综合大词典》
32 perfectly 8Mzxb     
adv.完美地,无可非议地,彻底地
参考例句:
  • The witnesses were each perfectly certain of what they said.证人们个个对自己所说的话十分肯定。
  • Everything that we're doing is all perfectly above board.我们做的每件事情都是光明正大的。
33 racing 1ksz3w     
n.竞赛,赛马;adj.竞赛用的,赛马用的
参考例句:
  • I was watching the racing on television last night.昨晚我在电视上看赛马。
  • The two racing drivers fenced for a chance to gain the lead.两个赛车手伺机竞相领先。
34 sprained f314e68885bee024fbaac62a560ab7d4     
v.&n. 扭伤
参考例句:
  • I stumbled and sprained my ankle. 我摔了一跤,把脚脖子扭了。
  • When Mary sprained her ankles, John carried her piggyback to the doctors. 玛丽扭伤了足踝,约翰驮她去看医生。
35 aeronautical 0fce381ad0fdd2394d73bfae598f4a00     
adj.航空(学)的
参考例句:
  • Many of the pilots were to achieve eminence in the aeronautical world. 这些飞行员中很多人将会在航空界声名显赫。 来自辞典例句
  • The advent of aircraft brought with it aeronautical engineering. 宇宙飞船的问世导致了航天工程的出现。 来自辞典例句
36 delightful 6xzxT     
adj.令人高兴的,使人快乐的
参考例句:
  • We had a delightful time by the seashore last Sunday.上星期天我们在海滨玩得真痛快。
  • Peter played a delightful melody on his flute.彼得用笛子吹奏了一支欢快的曲子。
37 faculties 066198190456ba4e2b0a2bda2034dfc5     
n.能力( faculty的名词复数 );全体教职员;技巧;院
参考例句:
  • Although he's ninety, his mental faculties remain unimpaired. 他虽年届九旬,但头脑仍然清晰。
  • All your faculties have come into play in your work. 在你的工作中,你的全部才能已起到了作用。 来自《简明英汉词典》
38 elastic Tjbzq     
n.橡皮圈,松紧带;adj.有弹性的;灵活的
参考例句:
  • Rubber is an elastic material.橡胶是一种弹性材料。
  • These regulations are elastic.这些规定是有弹性的。
39 underneath VKRz2     
adj.在...下面,在...底下;adv.在下面
参考例句:
  • Working underneath the car is always a messy job.在汽车底下工作是件脏活。
  • She wore a coat with a dress underneath.她穿着一件大衣,里面套着一条连衣裙。
40 conveyance OoDzv     
n.(不动产等的)转让,让与;转让证书;传送;运送;表达;(正)运输工具
参考例句:
  • Bicycles have become the most popular conveyance for Chinese people.自行车已成为中国人最流行的代步工具。
  • Its another,older,usage is a synonym for conveyance.它的另一个更古老的习惯用法是作为财产转让的同义词使用。
41 zest vMizT     
n.乐趣;滋味,风味;兴趣
参考例句:
  • He dived into his new job with great zest.他充满热情地投入了新的工作。
  • He wrote his novel about his trip to Asia with zest.他兴趣浓厚的写了一本关于他亚洲之行的小说。
42 gusts 656c664e0ecfa47560efde859556ddfa     
一阵强风( gust的名词复数 ); (怒、笑等的)爆发; (感情的)迸发; 发作
参考例句:
  • Her profuse skirt bosomed out with the gusts. 她的宽大的裙子被风吹得鼓鼓的。
  • Turbulence is defined as a series of irregular gusts. 紊流定义为一组无规则的突风。
43 vertically SfmzYG     
adv.垂直地
参考例句:
  • Line the pages for the graph both horizontally and vertically.在这几页上同时画上横线和竖线,以便制作图表。
  • The human brain is divided vertically down the middle into two hemispheres.人脑从中央垂直地分为两半球。
44 vicissitudes KeFzyd     
n.变迁,世事变化;变迁兴衰( vicissitude的名词复数 );盛衰兴废
参考例句:
  • He experienced several great social vicissitudes in his life. 他一生中经历了几次大的社会变迁。 来自《简明英汉词典》
  • A man used to vicissitudes is not easily dejected. 饱经沧桑,不易沮丧。 来自《简明英汉词典》
45 counteracted 73400d69af35e4420879e17c972937fb     
对抗,抵消( counteract的过去式 )
参考例句:
  • This can be counteracted only by very effective insulation. 这只能用非常有效的绝缘来防止。
  • The effect of his preaching was counteracted by the looseness of his behavior. 他讲道的效果被他放荡的生活所抵消了。
46 meditation yjXyr     
n.熟虑,(尤指宗教的)默想,沉思,(pl.)冥想录
参考例句:
  • This peaceful garden lends itself to meditation.这个恬静的花园适于冥想。
  • I'm sorry to interrupt your meditation.很抱歉,我打断了你的沉思。
47 minor e7fzR     
adj.较小(少)的,较次要的;n.辅修学科;vi.辅修
参考例句:
  • The young actor was given a minor part in the new play.年轻的男演员在这出新戏里被分派担任一个小角色。
  • I gave him a minor share of my wealth.我把小部分财产给了他。
48 velocity rLYzx     
n.速度,速率
参考例句:
  • Einstein's theory links energy with mass and velocity of light.爱因斯坦的理论把能量同质量和光速联系起来。
  • The velocity of light is about 300000 kilometres per second.光速约为每秒300000公里。
49 undue Vf8z6V     
adj.过分的;不适当的;未到期的
参考例句:
  • Don't treat the matter with undue haste.不要过急地处理此事。
  • It would be wise not to give undue importance to his criticisms.最好不要过分看重他的批评。
50 gull meKzM     
n.鸥;受骗的人;v.欺诈
参考例句:
  • The ivory gull often follows polar bears to feed on the remains of seal kills.象牙海鸥经常跟在北极熊的后面吃剩下的海豹尸体。
  • You are not supposed to gull your friends.你不应该欺骗你的朋友。
51 gulls 6fb3fed3efaafee48092b1fa6f548167     
n.鸥( gull的名词复数 )v.欺骗某人( gull的第三人称单数 )
参考例句:
  • A flock of sea gulls are hovering over the deck. 一群海鸥在甲板上空飞翔。 来自《现代汉英综合大词典》
  • The gulls which haunted the outlying rocks in a prodigious number. 数不清的海鸥在遥远的岩石上栖息。 来自辞典例句
52 conclave eY9yw     
n.秘密会议,红衣主教团
参考例句:
  • Signore,I ask and I prey,that you break this conclave.各位阁下,我请求,并祈祷,你们能停止这次秘密会议。
  • I met my partner at that conclave and my life moved into a huge shift.我就是在那次大会上遇到了我的伴侣的,而我的生活就转向了一个巨大的改变。
53 rusty hYlxq     
adj.生锈的;锈色的;荒废了的
参考例句:
  • The lock on the door is rusty and won't open.门上的锁锈住了。
  • I haven't practiced my French for months and it's getting rusty.几个月不用,我的法语又荒疏了。
54 swooped 33b84cab2ba3813062b6e35dccf6ee5b     
俯冲,猛冲( swoop的过去式和过去分词 )
参考例句:
  • The aircraft swooped down over the buildings. 飞机俯冲到那些建筑物上方。
  • The hawk swooped down on the rabbit and killed it. 鹰猛地朝兔子扑下来,并把它杀死。
55 downwards MsDxU     
adj./adv.向下的(地),下行的(地)
参考例句:
  • He lay face downwards on his bed.他脸向下伏在床上。
  • As the river flows downwards,it widens.这条河愈到下游愈宽。
56 motive GFzxz     
n.动机,目的;adv.发动的,运动的
参考例句:
  • The police could not find a motive for the murder.警察不能找到谋杀的动机。
  • He had some motive in telling this fable.他讲这寓言故事是有用意的。
57 costly 7zXxh     
adj.昂贵的,价值高的,豪华的
参考例句:
  • It must be very costly to keep up a house like this.维修这么一幢房子一定很昂贵。
  • This dictionary is very useful,only it is a bit costly.这本词典很有用,左不过贵了些。
58 investigation MRKzq     
n.调查,调查研究
参考例句:
  • In an investigation,a new fact became known, which told against him.在调查中新发现了一件对他不利的事实。
  • He drew the conclusion by building on his own investigation.他根据自己的调查研究作出结论。
59 investigator zRQzo     
n.研究者,调查者,审查者
参考例句:
  • He was a special investigator for the FBI.他是联邦调查局的特别调查员。
  • The investigator was able to deduce the crime and find the criminal.调查者能够推出犯罪过程并锁定罪犯。
60 inaccessible 49Nx8     
adj.达不到的,难接近的
参考例句:
  • This novel seems to me among the most inaccessible.这本书对我来说是最难懂的小说之一。
  • The top of Mount Everest is the most inaccessible place in the world.珠穆朗玛峰是世界上最难到达的地方。
61 contingencies ae3107a781f5a432c8e43398516126af     
n.偶然发生的事故,意外事故( contingency的名词复数 );以备万一
参考例句:
  • We must consider all possible contingencies. 我们必须考虑一切可能发生的事。
  • We must be prepared for all contingencies. 我们要作好各种准备,以防意外。 来自辞典例句
62 thoroughly sgmz0J     
adv.完全地,彻底地,十足地
参考例句:
  • The soil must be thoroughly turned over before planting.一定要先把土地深翻一遍再下种。
  • The soldiers have been thoroughly instructed in the care of their weapons.士兵们都系统地接受过保护武器的训练。
63 aeronautics BKVyg     
n.航空术,航空学
参考例句:
  • National Aeronautics and Space undertakings have made great progress.国家的航空航天事业有了很大的发展。
  • He devoted every spare moment to aeronautics.他把他所有多余的时间用在航空学上。
64 transcribed 2f9e3c34adbe5528ff14427d7ed17557     
(用不同的录音手段)转录( transcribe的过去式和过去分词 ); 改编(乐曲)(以适应他种乐器或声部); 抄写; 用音标标出(声音)
参考例句:
  • He transcribed two paragraphs from the book into his notebook. 他把书中的两段抄在笔记本上。
  • Every telephone conversation will be recorded and transcribed. 所有电话交谈都将被录音并作全文转写。
65 attain HvYzX     
vt.达到,获得,完成
参考例句:
  • I used the scientific method to attain this end. 我用科学的方法来达到这一目的。
  • His painstaking to attain his goal in life is praiseworthy. 他为实现人生目标所下的苦功是值得称赞的。
66 pivoted da69736312dbdb6475d7ba458b0076c1     
adj.转动的,回转的,装在枢轴上的v.(似)在枢轴上转动( pivot的过去式和过去分词 );把…放在枢轴上;以…为核心,围绕(主旨)展开
参考例句:
  • His old legs and shoulders pivoted with the swinging of the pulling. 他一把把地拉着,两条老迈的腿儿和肩膀跟着转动。 来自英汉文学 - 老人与海
  • When air is moving, the metal is pivoted on the hinge. 当空气流动时,金属板在铰链上转动。 来自辞典例句
67 forth Hzdz2     
adv.向前;向外,往外
参考例句:
  • The wind moved the trees gently back and forth.风吹得树轻轻地来回摇晃。
  • He gave forth a series of works in rapid succession.他很快连续发表了一系列的作品。
68 demonstration 9waxo     
n.表明,示范,论证,示威
参考例句:
  • His new book is a demonstration of his patriotism.他写的新书是他的爱国精神的证明。
  • He gave a demonstration of the new technique then and there.他当场表演了这种新的操作方法。
69 glided dc24e51e27cfc17f7f45752acf858ed1     
v.滑动( glide的过去式和过去分词 );掠过;(鸟或飞机 ) 滑翔
参考例句:
  • The President's motorcade glided by. 总统的车队一溜烟开了过去。
  • They glided along the wall until they were out of sight. 他们沿着墙壁溜得无影无踪。 来自《简明英汉词典》
70 applicants aaea8e805a118b90e86f7044ecfb6d59     
申请人,求职人( applicant的名词复数 )
参考例句:
  • There were over 500 applicants for the job. 有500多人申请这份工作。
  • He was impressed by the high calibre of applicants for the job. 求职人员出色的能力给他留下了深刻印象。
71 haphazard n5oyi     
adj.无计划的,随意的,杂乱无章的
参考例句:
  • The town grew in a haphazard way.这城镇无计划地随意发展。
  • He regrerted his haphazard remarks.他悔不该随口说出那些评论话。
72 requisite 2W0xu     
adj.需要的,必不可少的;n.必需品
参考例句:
  • He hasn't got the requisite qualifications for the job.他不具备这工作所需的资格。
  • Food and air are requisite for life.食物和空气是生命的必需品。
73 formulating 40080ab94db46e5c26ccf0e5aa91868a     
v.构想出( formulate的现在分词 );规划;确切地阐述;用公式表示
参考例句:
  • At present, the Chinese government is formulating nationwide regulations on the control of such chemicals. 目前,中国政府正在制定全国性的易制毒化学品管理条例。 来自汉英非文学 - 白皮书
  • Because of this, the U.S. has taken further steps in formulating the \"Magellan\" programme. 为此,美国又进一步制定了“麦哲伦”计划。 来自百科语句
74 remarkable 8Vbx6     
adj.显著的,异常的,非凡的,值得注意的
参考例句:
  • She has made remarkable headway in her writing skills.她在写作技巧方面有了长足进步。
  • These cars are remarkable for the quietness of their engines.这些汽车因发动机没有噪音而不同凡响。
75 standing 2hCzgo     
n.持续,地位;adj.永久的,不动的,直立的,不流动的
参考例句:
  • After the earthquake only a few houses were left standing.地震过后只有几幢房屋还立着。
  • They're standing out against any change in the law.他们坚决反对对法律做任何修改。
76 liberated YpRzMi     
a.无拘束的,放纵的
参考例句:
  • The city was liberated by the advancing army. 军队向前挺进,解放了那座城市。
  • The heat brings about a chemical reaction, and oxygen is liberated. 热量引起化学反应,释放出氧气。
77 sensational Szrwi     
adj.使人感动的,非常好的,轰动的,耸人听闻的
参考例句:
  • Papers of this kind are full of sensational news reports.这类报纸满是耸人听闻的新闻报道。
  • Their performance was sensational.他们的演出妙极了。
78 braced 4e05e688cf12c64dbb7ab31b49f741c5     
adj.拉牢的v.支住( brace的过去式和过去分词 );撑牢;使自己站稳;振作起来
参考例句:
  • They braced up the old house with balks of timber. 他们用梁木加固旧房子。 来自《简明英汉词典》
  • The house has a wooden frame which is braced with brick. 这幢房子是木结构的砖瓦房。 来自《简明英汉词典》


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