Former Experiments.--The Doctor's Five Receptacles.--The Gas Cylinder¹.-- The Calorifere.--The System of Manoeuvring.--Success certain.

"The attempt has often been made, gentlemen," said the doctor, "to rise and descend² at will, without losing ballast or gas from the balloon. A French aeronaut, M. Meunier, tried to accomplish this by compressing air in an inner receptacle. A Belgian, Dr. Van Hecke, by means of wings and paddles, obtained a vertical³ power that would have sufficed in most cases, but the practical results secured from these experiments have been insignificant⁴.

"I therefore resolved to go about the thing more directly; so, at the start, I dispensed⁵ with ballast altogether, excepting as a provision for cases of special emergency, such as the breakage of my apparatus⁶, or the necessity of ascending⁷ very suddenly, so as to avoid unforeseen obstacles.

"My means of ascent⁹ and descent consist simply in dilating¹⁰ or contracting the gas that is in the balloon by the application of different temperatures, and here is the method of obtaining that result.

"You saw me bring on board with the car several cases or receptacles, the use of which you may not have understood. They are five in number.

"The first contains about twenty-five gallons of water, to which I add a few drops of sulphuric acid, so as to augment¹¹ its capacity as a conductor of electricity, and then I decompose

点击收听单词发音  

1 cylinder
n.圆筒，柱(面)，汽缸
参考例句：
What's the volume of this cylinder?这个圆筒的体积有多少？ The cylinder is getting too much gas and not enough air.汽缸里汽油太多而空气不足。

2 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。

3 vertical
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。

4 insignificant
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。

5 dispensed
v.分配( dispense的过去式和过去分词 )；施与；配（药）
参考例句：
Not a single one of these conditions can be dispensed with. 这些条件缺一不可。 来自《现代汉英综合大词典》 They dispensed new clothes to the children in the orphanage. 他们把新衣服发给孤儿院的小孩们。 来自《现代英汉综合大词典》

6 apparatus
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。

7 ascending
adj.上升的，向上的
参考例句：
Now draw or trace ten dinosaurs in ascending order of size.现在按照体型由小到大的顺序画出或是临摹出10只恐龙。

8 ascend
vi.渐渐上升，升高；vt.攀登，登上
参考例句：
We watched the airplane ascend higher and higher.我们看着飞机逐渐升高。 We ascend in the order of time and of development.我们按时间和发展顺序向上溯。

9 ascent
n.(声望或地位)提高；上升，升高；登高
参考例句：
His rapid ascent in the social scale was surprising.他的社会地位提高之迅速令人吃惊。 Burke pushed the button and the elevator began its slow ascent.伯克按动电钮，电梯开始缓慢上升。

10 dilating
v.（使某物）扩大，膨胀，张大( dilate的现在分词 )
参考例句：
Compliance is the dilating extent of elastic tissue below pressure. 顺应性是指外力作用下弹性组织的可扩张性。 来自互联网 For dilating the bearing life, bearing should keep lubricative well. 为延长轴承寿命，轴承应保持良好的润滑状态。 来自互联网

11 augment
vt.(使)增大，增加，增长，扩张
参考例句：
They hit upon another idea to augment their income.他们又想出一个增加收入的办法。 The government's first concern was to augment the army and auxiliary forces.政府首先关心的是增强军队和辅助的力量。

12 decompose
vi.分解；vt.（使）腐败，（使）腐烂
参考例句：
The eggs began to decompose after a day in the sun.鸡蛋在太阳下放了一天后开始变坏。 Most animals decompose very quickly after death.大多数动物死后很快腐烂。

13 decomposition
n. 分解, 腐烂, 崩溃
参考例句：
It is said that the magnetite was formed by a chemical process called thermal decomposition. 据说这枚陨星是在热分解的化学过程中形成的。 The dehydration process leads to fairly extensive decomposition of the product. 脱水过程会导致产物相当程度的分解。

14 commingle
v.混合
参考例句：
I think I'll commingle some of these blue flowers with the pink ones.我想把一些蓝花和粉红花搀在一起。 Ground waters originating in different beds commingle.来源于不同层位的地下水相互混合。

15 platinum
n.白金
参考例句：
I'll give her a platinum ring.我打算送给她一枚白金戒指。 Platinum exceeds gold in value.白金的价值高于黄金。

16 intervals
n.[军事]间隔( interval的名词复数 )；间隔时间；[数学]区间；（戏剧、电影或音乐会的）幕间休息
参考例句：
The forecast said there would be sunny intervals and showers. 预报间晴，有阵雨。 Meetings take place at fortnightly intervals. 每两周开一次会。

17 cylindrical
adj.圆筒形的
参考例句：
huge cylindrical gas tanks 巨大的圆柱形贮气罐 Beer cans are cylindrical. 啤酒罐子是圆筒形的。

18 penetrates
v.穿过( penetrate的第三人称单数 )；刺入；了解；渗透
参考例句：
This is a telescope that penetrates to the remote parts of the universe. 这是一架能看到宇宙中遥远地方的望远镜。 来自《简明英汉词典》 The dust is so fine that it easily penetrates all the buildings. 尘土极细，能极轻易地钻入一切建筑物。 来自辞典例句

19 cone
n.圆锥体，圆锥形东西，球果
参考例句：
Saw-dust piled up in a great cone.锯屑堆积如山。 The police have sectioned off part of the road with traffic cone.警察用锥形路标把部分路面分隔开来。

20 spherical
adj.球形的；球面的
参考例句：
The Earth is a nearly spherical planet.地球是一个近似球体的行星。 Many engineers shy away from spherical projection methods.许多工程师对球面投影法有畏难情绪。

21 extremity
n.末端，尽头；尽力；终极；极度
参考例句：
I hope you will help them in their extremity.我希望你能帮助在穷途末路的他们。 What shall we do in this extremity?在这种极其困难的情况下我们该怎么办呢？

22 ascends
v.上升，攀登( ascend的第三人称单数 )
参考例句：
The azygos vein ascends in the right paravertebral gutter. 奇静脉在右侧脊柱旁沟内上升。 来自辞典例句 The mortality curve ascends gradually to a plateau at age 65. 死亡曲线逐渐上升，到65岁时成平稳状态。 来自辞典例句

23 incessantly
ad.不停地
参考例句：
The machines roar incessantly during the hours of daylight. 机器在白天隆隆地响个不停。 It rained incessantly for the whole two weeks. 雨不间断地下了整整两个星期。

24 applied
adj.应用的；v.应用，适用
参考例句：
She plans to take a course in applied linguistics.她打算学习应用语言学课程。 This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。

25 dilate
vt.使膨胀，使扩大
参考例句：
At night,the pupils dilate to allow in more light.到了晚上，瞳孔就会扩大以接收更多光线。 Exercise dilates blood vessels on the surface of the brain.运动会使大脑表层的血管扩张。

26 Augmented
adj.增音的 动词augment的过去式和过去分词形式
参考例句：
'scientists won't be replaced," he claims, "but they will be augmented." 他宣称：“科学家不会被取代；相反，他们会被拓展。” 来自英汉非文学 - 科学史 The impact of the report was augmented by its timing. 由于发表的时间选得好，这篇报导的影响更大了。

27 equilibrium
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。

28 inflated
adj.（价格）飞涨的；（通货）膨胀的；言过其实的；充了气的v.使充气（于轮胎、气球等）( inflate的过去式和过去分词 )；（使）膨胀；（使）通货膨胀；物价上涨
参考例句：
He has an inflated sense of his own importance. 他自视过高。 They all seem to take an inflated view of their collective identity. 他们对自己的集体身份似乎都持有一种夸大的看法。 来自《简明英汉词典》

29 descends
v.下来( descend的第三人称单数 )；下去；下降；下斜
参考例句：
This festival descends from a religious rite. 这个节日起源于宗教仪式。 来自《简明英汉词典》 The path descends steeply to the village. 小路陡直而下直到村子。 来自《简明英汉词典》

30 inflates
v.使充气（于轮胎、气球等）( inflate的第三人称单数 )；（使）膨胀；（使）通货膨胀；物价上涨
参考例句：
Mass advertising often inflates prices rather than reducing them. 大宗广告常常是抬高物价而不是降低。 来自辞典例句 The device periodically inflates the cuff and takes a blood pressure reading. 定期气囊打气及进行血压读数。 来自互联网

31 abate
vi.(风势，疼痛等)减弱，减轻，减退
参考例句：
We must abate the noise pollution in our city.我们必须消除我们城里的噪音污染。 The doctor gave him some medicine to abate the powerful pain.医生给了他一些药，以减弱那剧烈的疼痛。

32 lurks
n.潜在，潜伏；（lurk的复数形式）vi.潜伏，埋伏（lurk的第三人称单数形式）
参考例句：
Behind his cool exterior lurks a reckless and frustrated person. 在冷酷的外表背后，他是一个鲁莽又不得志的人。 来自《简明英汉词典》 Good fortune lies within Bad, Bad fortune lurks within good. 福兮祸所倚，祸兮福所伏。 来自互联网

33 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。

34 combustion
n.燃烧；氧化；骚动
参考例句：
We might be tempted to think of combustion.我们也许会联想到氧化。 The smoke formed by their combustion is negligible.由它燃烧所生成的烟是可忽略的。

35 solely
adv.仅仅，唯一地
参考例句：
Success should not be measured solely by educational achievement.成功与否不应只用学业成绩来衡量。 The town depends almost solely on the tourist trade.这座城市几乎完全靠旅游业维持。

36 vapor
n.蒸汽，雾气
参考例句：
The cold wind condenses vapor into rain.冷风使水蒸气凝结成雨。 This new machine sometimes transpires a lot of hot vapor.这部机器有时排出大量的热气。

37 attained
（通常经过努力）实现( attain的过去式和过去分词 )； 达到； 获得； 达到（某年龄、水平、状况）
参考例句：
She has attained the degree of Master of Arts. 她已获得文学硕士学位。 Lu Hsun attained a high position in the republic of letters. 鲁迅在文坛上获得崇高的地位。

38 constituent
n.选民；成分，组分；adj.组成的，构成的
参考例句：
Sugar is the main constituent of candy.食糖是糖果的主要成分。 Fibre is a natural constituent of a healthy diet.纤维是健康饮食的天然组成部分。

39 atmospheric
adj.大气的，空气的；大气层的；大气所引起的
参考例句：
Sea surface temperatures and atmospheric circulation are strongly coupled.海洋表面温度与大气环流是密切相关的。 Clouds return radiant energy to the surface primarily via the atmospheric window.云主要通过大气窗区向地表辐射能量。

40 fully
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。

41 expends
v.花费( expend的第三人称单数 )；使用（钱等）做某事；用光；耗尽
参考例句：
The commercial value height also expends demand how many! 商业价值高低也就是消费需求多少！ 来自互联网 The stimulation expends basis, also lies in enhances the resident income. 刺激消费的根本，还在于提高居民收入。 来自互联网

42 lighting
n.照明，光线的明暗，舞台灯光
参考例句：
The gas lamp gradually lost ground to electric lighting.煤气灯逐渐为电灯所代替。 The lighting in that restaurant is soft and romantic.那个餐馆照明柔和而且浪漫。

43 elevation
n.高度；海拔；高地；上升；提高
参考例句：
The house is at an elevation of 2,000 metres.那幢房子位于海拔两千米的高处。 His elevation to the position of General Manager was announced yesterday.昨天宣布他晋升总经理职位。

44 replenish
vt.补充；(把…)装满；(再)填满
参考例句：
I always replenish my food supply before it is depleted.我总是在我的食物吃完之前加以补充。 We have to import an extra 4 million tons of wheat to replenish our reserves.我们不得不额外进口四百万吨小麦以补充我们的储备。

45 dilation
n.膨胀，扩张，扩大
参考例句：
Time dilation works both ways. 时间膨胀在两方面都起作用。 来自辞典例句 The ciliary body is an anterior dilation of the choroid at the level of the lens. 晶状体是脉络膜石晶状体平面上向前扩大的部分。 来自辞典例句

46 contraction
n.缩略词，缩写式，害病
参考例句：
The contraction of this muscle raises the lower arm.肌肉的收缩使前臂抬起。 The forces of expansion are balanced by forces of contraction.扩张力和收缩力相互平衡。

47 locomotion
n.运动，移动
参考例句：
By land,air or sea,birds are masters of locomotion.无论是通过陆地，飞越空中还是穿过海洋，鸟应算是运动能手了。 Food sources also elicit oriented locomotion and recognition behavior patterns in most insects.食物源也引诱大多数昆虫定向迁移和识别行为。

48 cumbersome
adj.笨重的，不便携带的
参考例句：
Although the machine looks cumbersome,it is actually easy to use.尽管这台机器看上去很笨重，操作起来却很容易。 The furniture is too cumbersome to move.家具太笨，搬起来很不方便。

49 inconvenient
adj.不方便的，令人感到麻烦的
参考例句：
You have come at a very inconvenient time.你来得最不适时。 Will it be inconvenient for him to attend that meeting?他参加那次会议会不方便吗？

50 discourse
n.论文，演说；谈话；话语；vi.讲述，著述
参考例句：
We'll discourse on the subject tonight.我们今晚要谈论这个问题。 He fell into discourse with the customers who were drinking at the counter.他和站在柜台旁的酒客谈了起来。

51 heartily
adv.衷心地，诚恳地，十分，很
参考例句：
He ate heartily and went out to look for his horse.他痛快地吃了一顿，就出去找他的马。 The host seized my hand and shook it heartily.主人抓住我的手，热情地和我握手。

52 decided
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。