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【英语时差8,16】蜗牛2

时间:2015-11-17 07:10来源:互联网 提供网友:yajing   字体: [ ]
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Now here’s the strange part. About once a week, as garden snails2 share caresses3, pressure builds up in the area surrounding a sac near the genital region housing a calcium4 dart5. Just for the moment of sexual penetration6, the impregnating snail1 stabs its partner near the genitals with what scientists have dubbed7 the snail love dart. But what might sound like a nasty sadomasochistic ritual does have a practical purpose. According to one study, the darts8 are tipped with a chemical preventing the snail on the receiving end from digesting most of its mate’s sperm9. As in many species, the garden snail’s female reproductive tract10 is hostile to sperm, allowing only the toughest and most resilient to fertilize11 the egg. To increase its chances of passing on its genes12, the impregnating snail fires a dart to give its sperm a fighting chance.


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1 snail 8xcwS     
n.蜗牛
参考例句:
  • Snail is a small plant-eating creature with a soft body.蜗牛是一种软体草食动物。
  • Time moved at a snail's pace before the holidays.放假前的时间过得很慢。
2 snails 23436a8a3f6bf9f3c4a9f6db000bb173     
n.蜗牛;迟钝的人;蜗牛( snail的名词复数 )
参考例句:
  • I think I'll try the snails for lunch—I'm feeling adventurous today. 我想我午餐要尝一下蜗牛——我今天很想冒险。 来自《简明英汉词典》
  • Most snails have shells on their backs. 大多数蜗牛背上有壳。 来自《简明英汉词典》
3 caresses 300460a787072f68f3ae582060ed388a     
爱抚,抚摸( caress的名词复数 )
参考例句:
  • A breeze caresses the cheeks. 微风拂面。
  • Hetty was not sufficiently familiar with caresses or outward demonstrations of fondness. 海蒂不习惯于拥抱之类过于外露地表现自己的感情。
4 calcium sNdzY     
n.钙(化学符号Ca)
参考例句:
  • We need calcium to make bones.我们需要钙来壮骨。
  • Calcium is found most abundantly in milk.奶含钙最丰富。
5 dart oydxK     
v.猛冲,投掷;n.飞镖,猛冲
参考例句:
  • The child made a sudden dart across the road.那小孩突然冲过马路。
  • Markov died after being struck by a poison dart.马尔科夫身中毒镖而亡。
6 penetration 1M8xw     
n.穿透,穿人,渗透
参考例句:
  • He is a man of penetration.他是一个富有洞察力的人。
  • Our aim is to achieve greater market penetration.我们的目标是进一步打入市场。
7 dubbed dubbed     
v.给…起绰号( dub的过去式和过去分词 );把…称为;配音;复制
参考例句:
  • Mathematics was once dubbed the handmaiden of the sciences. 数学曾一度被视为各门科学的基础。
  • Is the movie dubbed or does it have subtitles? 这部电影是配音的还是打字幕的? 来自《简明英汉词典》
8 darts b1f965d0713bbf1014ed9091c7778b12     
n.掷飞镖游戏;飞镖( dart的名词复数 );急驰,飞奔v.投掷,投射( dart的第三人称单数 );向前冲,飞奔
参考例句:
  • His darts trophy takes pride of place on the mantelpiece. 他将掷镖奖杯放在壁炉顶上最显著的地方。 来自《简明英汉词典》
  • I never saw so many darts in a bodice! 我从没见过紧身胸衣上纳了这么多的缝褶! 来自《简明英汉词典》
9 sperm jFOzO     
n.精子,精液
参考例句:
  • Only one sperm fertilises an egg.只有一个精子使卵子受精。
  • In human reproduction,one female egg is usually fertilized by one sperm.在人体生殖过程中,一个精子使一个卵子受精。
10 tract iJxz4     
n.传单,小册子,大片(土地或森林)
参考例句:
  • He owns a large tract of forest.他拥有一大片森林。
  • He wrote a tract on this subject.他曾对此写了一篇短文。
11 fertilize hk5x8     
v.使受精,施肥于,使肥沃
参考例句:
  • Fertilizer is a substance put on land to fertilize it.肥料是施在地里使之肥沃的物质。
  • Reading will fertilize his vocabulary.阅读会丰富他的词汇。
12 genes 01914f8eac35d7e14afa065217edd8c0     
n.基因( gene的名词复数 )
参考例句:
  • You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
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