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英语听力：自然百科 大迁徙 Great Migrations—17

时间：2014-05-21 08:05:29

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（单词翻译）

 The merciless yellow crazy ants take a terrible toll1. But by sheer force of numbers and the inexorable will of their genes2, they prevail. 

 
That is the fierce logic3 of migrations4. But what is logical for the many can be madness for the few.
 
At the Mara River, the madness has begun. The crocodiles, from long experience, know who to target--the young. Calves5 strain to stay by their mother sides to no avail. Powerful sharp hooves descend6 on the reptiles7 again and again. On the far banks, wrenching8 scenes of those who almost made it, watched helpless by distraught mothers.

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1 toll LJpzo     
n.过路(桥)费；损失，伤亡人数；v.敲(钟)
参考例句：
  • The hailstone took a heavy toll of the crops in our village last night.昨晚那场冰雹损坏了我们村的庄稼。
  • The war took a heavy toll of human life.这次战争夺去了许多人的生命。
2 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
3 logic j0HxI     
n.逻辑(学)；逻辑性
参考例句：
  • What sort of logic is that?这是什么逻辑？
  • I don't follow the logic of your argument.我不明白你的论点逻辑性何在。
4 migrations 2d162e07be0cf65cc1054b2128c60258     
n.迁移，移居( migration的名词复数 )
参考例句：
  • It foundered during the turmoils accompanying the Great Migrations. 它在随着民族大迁徙而出现的混乱中崩溃。 来自辞典例句
  • Birds also have built-in timepieces which send them off on fall and spring migrations. 鸟类也有天生的时间感应器指导它们秋春迁移。 来自互联网
5 calves bb808da8ca944ebdbd9f1d2688237b0b     
n.(calf的复数)笨拙的男子，腓；腿肚子( calf的名词复数 )；牛犊；腓；小腿肚v.生小牛( calve的第三人称单数 )；（冰川）崩解；生（小牛等），产（犊）；使（冰川）崩解
参考例句：
  • a cow suckling her calves 给小牛吃奶的母牛
  • The calves are grazed intensively during their first season. 小牛在生长的第一季里集中喂养。 来自《简明英汉词典》
6 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。
7 reptiles 45053265723f59bd84cf4af2b15def8e     
n.爬行动物，爬虫( reptile的名词复数 )
参考例句：
  • Snakes and crocodiles are both reptiles. 蛇和鳄鱼都是爬行动物。 来自《简明英汉词典》
  • Birds, reptiles and insects come from eggs. 鸟类、爬虫及昆虫是卵生的。 来自《现代汉英综合大词典》
8 wrenching 30892474a599ed7ca0cbef49ded6c26b     
n.修截苗根，苗木铲根（铲根时苗木不起土或部分起土）v.（猛力地）扭( wrench的现在分词 )；扭伤；使感到痛苦；使悲痛
参考例句：
  • China has been through a wrenching series of changes and experiments. 中国经历了一系列艰苦的变革和试验。 来自辞典例句
  • A cold gust swept across her exposed breast, wrenching her back to reality. 一股寒气打击她的敞开的胸膛，把她从梦幻的境地中带了回来。 来自汉英文学 - 家（1-26） - 家（1-26）

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