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首页 » 英文短篇小说 » The Evolutionist at Large » XVII. THE ORIGIN OF WALNUTS.
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XVII. THE ORIGIN OF WALNUTS.
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Mr. Darwin has devoted1 no small portion of his valuable life to tracing, in two bulky volumes, the Descent of Man. Yet I suppose it is probable that in our narrow anthropinism we should have refused to listen to him had he given us two volumes instead on the Descent of Walnuts2. Viewed as a question merely of biological science, the one subject is just as important as the other. But the old Greek doctrine5 that 'man is the measure of all things' is strong in us still. We form for ourselves a sort of pre-Copernican universe, in which the world occupies the central point of space, and man occupies the central point of the world. What touches man interests us deeply: what concerns him but slightly we pass over as of no consequence. Nevertheless, even the origin and development of walnuts is a subject upon which we may profitably reflect, not wholly without gratification and interest.

This kiln-dried walnut3 on my plate, which has suggested such abstract cogitations to my mind, is shown by its very name to be a foreign production; for the word contains the same root as Wales and Welsh, the old Teutonic name for men of a different race, which the Germans still apply to the Italians, and we ourselves to the last relics6 of the old Keltic population in Southern Britain. It means 'the foreign nut,' and it comes for the most part from the south of Europe. As a nut, it represents a very different type of fruit from the strawberry and raspberry, with their bright colours, sweet juices, and nutritious7 pulp8. Those fruits which alone bear the name in common parlance9 are attractive in their object; the nuts are deterrent10. An orange or a plum is brightly tinted11 with hues12 which contrast strongly with the surrounding foliage13; its pleasant taste and soft pulp all advertise it for the notice of birds or monkeys, as a means for assisting in the dispersion of its seed. But a nut, on the contrary, is a fruit whose actual seed contains an abundance of oils and other pleasant food-stuffs, which must be carefully guarded against the depredations15 of possible foes16. In the plum or the orange we do not eat the seed itself: we only eat the surrounding pulp. But in the walnut the part which we utilise is the embryo17 plant itself; and so the walnut's great object in life is to avoid being eaten. Accordingly, that part of the fruit which in the plum is stored with sweet juices is, in the walnut, filled with a bitter and very nauseous essence. We seldom see this bitter covering in our over-civilised life, because it is, of course, removed before the nuts come to table. The walnut has but a thin shell, and is poorly protected in comparison with some of its relations, such as the American butternut, which can only be cracked by a sharp blow from a hammer—or even the hickory, whose hard covering has done more to destroy the teeth of New Englanders than all other causes put together, and New England teeth are universally admitted to be the very worst in the world. Now, all nuts have to guard against squirrels and birds; and therefore their peculiarities18 are exactly opposite to those of succulent fruits. Instead of attracting attention by being brightly coloured, they are invariably green like the leaves while they remain on the tree, and brown or dusky like the soil when they fall upon the ground beneath; instead of being enclosed in sweet coats, they are provided with bitter, acrid19, or stinging husks; and, instead of being soft in texture20, they are surrounded by hard shells, like the coco-nut, or have a perfectly21 solid kernel22, like the vegetable ivory.

The origin of nuts is thus exactly the reverse side of the origin of fruits. Certain seeds, richly stored with oils and starches23 for aiding the growth of the young plant, are exposed to the attacks of squirrels, monkeys, parrots, and other arboreal24 animals. The greater part of them are eaten and completely destroyed by these their enemies, and so never hand down their peculiarities to any descendants. But all fruits vary a little in sweetness and bitterness, pulpy25 or stringy tendencies. Thus a few among them happen to be protected from destruction by their originally accidental possession of a bitter husk, a hard shell, or a few awkward spines26 and bristles27. These the monkeys and squirrels reject; and they alone survive as the parents of future generations. The more persistent28 and the hungrier their foes become, the less will a small degree of bitterness or hardness serve to protect them. Hence, from generation to generation, the bitterness and the hardness will go on increasing, because only those nuts which are the nastiest and the most difficult to crack will escape destruction from the teeth or bills of the growing and pressing population of rodents29 and birds. The nut which best survives on the average is that which is least conspicuous30 in colour, has a rind of the most objectionable taste, and is enclosed in the most solid shell. But the extent to which such precautions become necessary will depend much upon the particular animals to whose attacks the nuts of each country are exposed. The European walnut has only to defy a few small woodland animals, who are sufficiently31 deterred32 by its acrid husk; the American butter-nut has to withstand the long teeth of much more formidable forestine rodents, whom it sets at nought33 with its stony34 and wrinkled shell; and the tropical cocos and Brazil nuts have to escape the monkey, who pounds them with stones, or flings them with all his might from the tree-top so as to smash them in their fall against the ground below.

Our own hazel-nut supplies an excellent illustration of the general tactics adopted by the nuts at large. The little red tufted blossoms which everybody knows so well in early spring are each surrounded by a bunch of three bracts; and as the nut grows bigger, these bracts form a green leaf-like covering, which causes it to look very much like the ordinary foliage of the hazel-tree. Besides, they are thickly set with small prickly hairs, which are extremely annoying to the fingers, and must prove far more unpleasant to the delicate lips and noses of lower animals. Just at present the nuts have reached this stage in our copses; but as soon as autumn sets in, and the seeds are ripe, they will turn brown, fall out of their withered35 investment, and easily escape notice on the soil beneath, where the dead leaves will soon cover them up in a mass of shrivelled brown, indistinguishable in shade from the nuts themselves. Take, as an example of the more carefully protected tropical kinds, the coco-nut. Growing on a very tall palm-tree, it has to fall a considerable distance toward the earth; and so it is wrapped round in a mass of loose knotted fibre, which breaks the fall just as a lot of soft wool would do. Then, being a large nut, fully14 stored with an abundance of meat, it offers special attractions to animals, and consequently requires special means of defence. Accordingly, its shell is extravagantly36 thick, only one small soft spot being left at the blunter end, through which the young plant may push its head. Once upon a time, to be sure, the coco-nut contained three kernels37, and had three such soft spots or holes; but now two of them are aborted38, and the two holes remain only in the form of hard scars. The Brazil nut is even a better illustration. Probably few people know that the irregular angular nuts which appear at dessert by that name are originally contained inside a single round shell, where they fit tightly together, and acquire their queer indefinite shapes by mutual39 pressure. So the South American monkey has first to crack the thick external common shell against a stone or otherwise; and, if he is successful in this process, he must afterwards break the separate sharp-edged inner nuts with his teeth—a performance which is always painful and often ineffectual.

Yet it is curious that nuts and fruits are really produced by the very slightest variations on a common type, so much so that the technical botanist40 does not recognise the popular distinction between them at all. In his eyes, the walnut and the coco-nut are not nuts, but 'drupaceous fruits,' just like the plum and the cherry. All four alike contain a kernel within, a hard shell outside it, and a fibrous mass outside that again, bounded by a thin external layer. Only, while in the plum and cherry this fibrous mass becomes succulent and fills with sugary juice, in the walnut its juice is bitter, and in the coco-nut it has no juice at all, but remains41 a mere4 matted layer of dry fibres. And while the thin external skin becomes purple in the plum and red in the cherry as the fruits ripen42, it remains green and brown in the walnut and coco-nut all their time. Nevertheless, Darwinism shows us both here and elsewhere that the popular distinction answers to a real difference of origin and function. When a seed-vessel, whatever its botanical structure, survives by dint43 of attracting animals, it always acquires a bright-coloured envelope and a sweet pulp; while it usually possesses a hard seed-shell, and often infuses bitter essences into its kernel. On the other hand, when a seed-vessel survives by escaping the notice of animals, it generally has a sweet and pleasant kernel, which it protects by a hard shell and an inconspicuous and nauseous envelope. If the kernel itself is bitter, as with the horse-chestnut, the need for disguise and external protection is much lessened44. But the best illustration of all is seen in the West Indian cashew-nut, which is what Alice in Wonderland would have called a portmanteau seed-vessel—a fruit and a nut rolled into one. In this curious case, the stalk swells45 out into a bright-coloured and juicy mass, looking something like a pear, but of course containing no seeds; while the nut grows out from its end, secured from intrusion by a covering with a pungent46 juice, which burns and blisters47 the skin at a touch. No animal except man can ever successfully tackle the cashew-nut itself; but by eating the pear-like stalk other animals ultimately aid in distributing the seed. The cashew thus vicariously sacrifices its fruit-stem for the sake of preserving its nut.

All nature is a continuous game of cross-purposes. Animals perpetually outwit plants, and plants in return once more outwit animals. Or, to drop the metaphor48, those animals alone survive which manage to get a living in spite of the protections adopted by plants; and those plants alone survive whose peculiarities happen successfully to defy the attack of animals. There you have the Darwinian Iliad in a nutshell.

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1 devoted xu9zka     
adj.忠诚的,忠实的,热心的,献身于...的
参考例句:
  • He devoted his life to the educational cause of the motherland.他为祖国的教育事业贡献了一生。
  • We devoted a lengthy and full discussion to this topic.我们对这个题目进行了长时间的充分讨论。
2 walnuts 465c6356861ea8aca24192b9eacd42e8     
胡桃(树)( walnut的名词复数 ); 胡桃木
参考例句:
  • Are there walnuts in this sauce? 这沙司里面有核桃吗?
  • We ate eggs and bacon, pickled walnuts and cheese. 我们吃鸡蛋,火腿,腌胡桃仁和干酪。
3 walnut wpTyQ     
n.胡桃,胡桃木,胡桃色,茶色
参考例句:
  • Walnut is a local specialty here.核桃是此地的土特产。
  • The stool comes in several sizes in walnut or mahogany.凳子有几种尺寸,材质分胡桃木和红木两种。
4 mere rC1xE     
adj.纯粹的;仅仅,只不过
参考例句:
  • That is a mere repetition of what you said before.那不过是重复了你以前讲的话。
  • It's a mere waste of time waiting any longer.再等下去纯粹是浪费时间。
5 doctrine Pkszt     
n.教义;主义;学说
参考例句:
  • He was impelled to proclaim his doctrine.他不得不宣扬他的教义。
  • The council met to consider changes to doctrine.宗教议会开会考虑更改教义。
6 relics UkMzSr     
[pl.]n.遗物,遗迹,遗产;遗体,尸骸
参考例句:
  • The area is a treasure house of archaeological relics. 这个地区是古文物遗迹的宝库。
  • Xi'an is an ancient city full of treasures and saintly relics. 西安是一个有很多宝藏和神圣的遗物的古老城市。
7 nutritious xHzxO     
adj.有营养的,营养价值高的
参考例句:
  • Fresh vegetables are very nutritious.新鲜蔬菜富于营养。
  • Hummingbirds have discovered that nectar and pollen are very nutritious.蜂鸟发现花蜜和花粉是很有营养的。
8 pulp Qt4y9     
n.果肉,纸浆;v.化成纸浆,除去...果肉,制成纸浆
参考例句:
  • The pulp of this watermelon is too spongy.这西瓜瓤儿太肉了。
  • The company manufactures pulp and paper products.这个公司制造纸浆和纸产品。
9 parlance VAbyp     
n.说法;语调
参考例句:
  • The term "meta directory" came into industry parlance two years ago.两年前,商业界开始用“元目录”这个术语。
  • The phrase is common diplomatic parlance for spying.这种说法是指代间谍行为的常用外交辞令。
10 deterrent OmJzY     
n.阻碍物,制止物;adj.威慑的,遏制的
参考例句:
  • Large fines act as a deterrent to motorists.高额罚款是对开车的人的制约。
  • I put a net over my strawberries as a deterrent to the birds.我在草莓上罩了网,免得鸟歇上去。
11 tinted tinted     
adj. 带色彩的 动词tint的过去式和过去分词
参考例句:
  • a pair of glasses with tinted lenses 一副有色镜片眼镜
  • a rose-tinted vision of the world 对世界的理想化看法
12 hues adb36550095392fec301ed06c82f8920     
色彩( hue的名词复数 ); 色调; 信仰; 观点
参考例句:
  • When the sun rose a hundred prismatic hues were reflected from it. 太阳一出,更把它映得千变万化、异彩缤纷。
  • Where maple trees grow, the leaves are often several brilliant hues of red. 在枫树生长的地方,枫叶常常呈现出数种光彩夺目的红色。
13 foliage QgnzK     
n.叶子,树叶,簇叶
参考例句:
  • The path was completely covered by the dense foliage.小路被树叶厚厚地盖了一层。
  • Dark foliage clothes the hills.浓密的树叶覆盖着群山。
14 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。
15 depredations 4f01882be2e81bff9ad88e891b8e5847     
n.劫掠,毁坏( depredation的名词复数 )
参考例句:
  • Protect the nation's resources against the depredations of other countries. 保护国家资源,不容他人染指。 来自《现代汉英综合大词典》
  • Hitler's early'successes\" were only the startling depredations of a resolute felon. 希特勒的早期“胜利”,只不过是一个死心塌地的恶棍出人意料地抢掠得手而已。 来自辞典例句
16 foes 4bc278ea3ab43d15b718ac742dc96914     
敌人,仇敌( foe的名词复数 )
参考例句:
  • They steadily pushed their foes before them. 他们不停地追击敌人。
  • She had fought many battles, vanquished many foes. 她身经百战,挫败过很多对手。
17 embryo upAxt     
n.胚胎,萌芽的事物
参考例句:
  • They are engaging in an embryo research.他们正在进行一项胚胎研究。
  • The project was barely in embryo.该计划只是个雏形。
18 peculiarities 84444218acb57e9321fbad3dc6b368be     
n. 特质, 特性, 怪癖, 古怪
参考例句:
  • the cultural peculiarities of the English 英国人的文化特点
  • He used to mimic speech peculiarities of another. 他过去总是模仿别人讲话的特点。
19 acrid TJEy4     
adj.辛辣的,尖刻的,刻薄的
参考例句:
  • There is an acrid tone to your remarks.你说这些话的口气带有讥刺意味。
  • The room was filled with acrid smoke.房里充满刺鼻的烟。
20 texture kpmwQ     
n.(织物)质地;(材料)构造;结构;肌理
参考例句:
  • We could feel the smooth texture of silk.我们能感觉出丝绸的光滑质地。
  • Her skin has a fine texture.她的皮肤细腻。
21 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。
22 kernel f3wxW     
n.(果实的)核,仁;(问题)的中心,核心
参考例句:
  • The kernel of his problem is lack of money.他的问题的核心是缺钱。
  • The nutshell includes the kernel.果壳裹住果仁。
23 starches 4a2ff941018a19601cc0790704781df1     
n.淀粉( starch的名词复数 );含淀粉的食物;浆粉v.把(衣服、床单等)浆一浆( starch的第三人称单数 )
参考例句:
  • You should avoid sugars and starches. 你应避免吃糖和含淀粉的食物。 来自《简明英汉词典》
  • Cotton and rayon yarns are most often sized with water-insoluble starches. 棉和人造丝纱多用不溶于水的淀粉上浆。 来自互联网
24 arboreal jNoyf     
adj.树栖的;树的
参考例句:
  • Man was evolved from an ancestor that was probably arboreal.人大概是从住在树上的祖先进化而来的。
  • Koala is an arboreal Australian marsupial.考拉是一种澳大利亚树栖有袋动物。
25 pulpy 0c94b3c743a7f83fc4c966269f8f4b4e     
果肉状的,多汁的,柔软的; 烂糊; 稀烂
参考例句:
  • The bean like seeds of this plant, enclosed within a pulpy fruit. 被包在肉质果实内的这种植物的豆样种子。
  • Her body felt bruised, her lips pulpy and tender. 她的身体感觉碰伤了,她的嘴唇柔软娇嫩。
26 spines 2e4ba52a0d6dac6ce45c445e5386653c     
n.脊柱( spine的名词复数 );脊椎;(动植物的)刺;书脊
参考例句:
  • Porcupines use their spines to protect themselves. 豪猪用身上的刺毛来自卫。
  • The cactus has spines. 仙人掌有刺。 来自《现代英汉综合大词典》
27 bristles d40df625d0ab9008a3936dbd866fa2ec     
短而硬的毛发,刷子毛( bristle的名词复数 )
参考例句:
  • the bristles on his chin 他下巴上的胡楂子
  • This job bristles with difficulties. 这项工作困难重重。
28 persistent BSUzg     
adj.坚持不懈的,执意的;持续的
参考例句:
  • Albert had a persistent headache that lasted for three days.艾伯特连续头痛了三天。
  • She felt embarrassed by his persistent attentions.他不时地向她大献殷勤,使她很难为情。
29 rodents 1ff5f0f12f2930e77fb620b1471a2124     
n.啮齿目动物( rodent的名词复数 )
参考例句:
  • Rodents carry diseases and are generally regarded as pests. 啮齿目动物传播疾病,常被当作害虫对待。 来自《简明英汉词典》
  • Some wild rodents in Africa also harbor the virus. 在非洲,有些野生啮齿动物也是储毒者。 来自辞典例句
30 conspicuous spszE     
adj.明眼的,惹人注目的;炫耀的,摆阔气的
参考例句:
  • It is conspicuous that smoking is harmful to health.很明显,抽烟对健康有害。
  • Its colouring makes it highly conspicuous.它的色彩使它非常惹人注目。
31 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。
32 deterred 6509d0c471f59ae1f99439f51e8ea52d     
v.阻止,制止( deter的过去式和过去分词 )
参考例句:
  • I told him I wasn't interested, but he wasn't deterred. 我已告诉他我不感兴趣,可他却不罢休。
  • Jeremy was not deterred by this criticism. 杰里米没有因这一批评而却步。 来自辞典例句
33 nought gHGx3     
n./adj.无,零
参考例句:
  • We must bring their schemes to nought.我们必须使他们的阴谋彻底破产。
  • One minus one leaves nought.一减一等于零。
34 stony qu1wX     
adj.石头的,多石头的,冷酷的,无情的
参考例句:
  • The ground is too dry and stony.这块地太干,而且布满了石头。
  • He listened to her story with a stony expression.他带着冷漠的表情听她讲经历。
35 withered 342a99154d999c47f1fc69d900097df9     
adj. 枯萎的,干瘪的,(人身体的部分器官)因病萎缩的或未发育良好的 动词wither的过去式和过去分词形式
参考例句:
  • The grass had withered in the warm sun. 这些草在温暖的阳光下枯死了。
  • The leaves of this tree have become dry and withered. 这棵树下的叶子干枯了。
36 extravagantly fcd90b89353afbdf23010caed26441f0     
adv.挥霍无度地
参考例句:
  • The Monroes continued to entertain extravagantly. 门罗一家继续大宴宾客。 来自辞典例句
  • New Grange is one of the most extravagantly decorated prehistoric tombs. 新格兰奇是装饰最豪华的史前陵墓之一。 来自辞典例句
37 kernels d01b84fda507090bbbb626ee421da586     
谷粒( kernel的名词复数 ); 仁; 核; 要点
参考例句:
  • These stones contain kernels. 这些核中有仁。
  • Resolving kernels and standard errors can also be computed for each block. 还可以计算每个块体的分辨核和标准误差。
38 aborted dfb7069bfc6e0064a6c667626eca07b4     
adj.流产的,失败的v.(使)流产( abort的过去式和过去分词 );(使)(某事物)中止;(因故障等而)(使)(飞机、宇宙飞船、导弹等)中断飞行;(使)(飞行任务等)中途失败
参考例句:
  • The rocket flight had to be aborted because of difficulties with computer. 因电脑出故障,这次火箭飞行只好中辍。 来自《简明英汉词典》
  • They aborted the space flight finally. 他们最后中止了这次宇航飞行。 来自《简明英汉词典》
39 mutual eFOxC     
adj.相互的,彼此的;共同的,共有的
参考例句:
  • We must pull together for mutual interest.我们必须为相互的利益而通力合作。
  • Mutual interests tied us together.相互的利害关系把我们联系在一起。
40 botanist kRTyL     
n.植物学家
参考例句:
  • The botanist introduced a new species of plant to the region.那位植物学家向该地区引入了一种新植物。
  • I had never talked with a botanist before,and I found him fascinating.我从没有接触过植物学那一类的学者,我觉得他说话极有吸引力。
41 remains 1kMzTy     
n.剩余物,残留物;遗体,遗迹
参考例句:
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。
42 ripen ph3yq     
vt.使成熟;vi.成熟
参考例句:
  • I'm waiting for the apples to ripen.我正在等待苹果成熟。
  • You can ripen the tomatoes on a sunny windowsill.把西红柿放在有阳光的窗台上可以让它们成熟。
43 dint plVza     
n.由于,靠;凹坑
参考例句:
  • He succeeded by dint of hard work.他靠苦干获得成功。
  • He reached the top by dint of great effort.他费了很大的劲终于爬到了顶。
44 lessened 6351a909991322c8a53dc9baa69dda6f     
减少的,减弱的
参考例句:
  • Listening to the speech through an interpreter lessened its impact somewhat. 演讲辞通过翻译的嘴说出来,多少削弱了演讲的力量。
  • The flight to suburbia lessened the number of middle-class families living within the city. 随着迁往郊外的风行,住在城内的中产家庭减少了。
45 swells e5cc2e057ee1aff52e79fb6af45c685d     
增强( swell的第三人称单数 ); 肿胀; (使)凸出; 充满(激情)
参考例句:
  • The waters were heaving up in great swells. 河水正在急剧上升。
  • A barrel swells in the middle. 水桶中部隆起。
46 pungent ot6y7     
adj.(气味、味道)刺激性的,辛辣的;尖锐的
参考例句:
  • The article is written in a pungent style.文章写得泼辣。
  • Its pungent smell can choke terrorists and force them out of their hideouts.它的刺激性气味会令恐怖分子窒息,迫使他们从藏身地点逃脱出来。
47 blisters 8df7f04e28aff1a621b60569ee816a0f     
n.水疱( blister的名词复数 );水肿;气泡
参考例句:
  • My new shoes have made blisters on my heels. 我的新鞋把我的脚跟磨起泡了。 来自《现代汉英综合大词典》
  • His new shoes raised blisters on his feet. 他的新鞋把他的脚磨起了水疱。 来自《简明英汉词典》
48 metaphor o78zD     
n.隐喻,暗喻
参考例句:
  • Using metaphor,we say that computers have senses and a memory.打个比方,我们可以说计算机有感觉和记忆力。
  • In poetry the rose is often a metaphor for love.玫瑰在诗中通常作为爱的象征。


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