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SSS 2008-01-24

时间:2010-05-13 01:35来源:互联网 提供网友:0922013129   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific Americans' 60-Second Science. I am Karen Hopkin, this will just take a minute.

Most school kids know that snakes can see with their noses, Vipers1 in particular have these organs on their noggins that allow them to see heat which helps them find their warm blooded prey2. If that's not wild enough for you, now physicists3 from Germany and Kansas say that snakes can hear with their jaws5. An idea they present in an upcoming issue of Physical Review Letters. See, snakes don't have actual ears, at least not on the outside, but they do have fully-formed inner-ear systems, complete with a cochlea, the fluid filled bone that harvests sound. But in snakes, the cochlea is connected to the jaw4 bone. So if you walk past a snake that's resting with its head on the ground, the vibrations6 from your footsteps jiggle the snake's jaw which shakes the snake's cochlea, so the snake can hear you move. In fact, the physicists found that this whole listening with your mouth setup can sense even the tiny vibrations made by scampering7 rodents8 or other small prey. And because snakes can unhinge their jaws one side at a time, they may be able to hear in stereo, which means that tapping on the glass of the rattlesnake exhibit is actually twice annoying as anyone ever realized.

Thanks for the minute, for Scientific Americans' 60-Second Science. I am Karen Hopkin.
 


点击收听单词发音收听单词发音  

1 vipers fb66fba4079dc2cfa4d4fc01b17098f5     
n.蝰蛇( viper的名词复数 );毒蛇;阴险恶毒的人;奸诈者
参考例句:
  • The fangs of pit vipers are long, hollow tubes. 颊窝毒蛇的毒牙是长的空心管子。 来自辞典例句
  • Vipers are distinguishable from other snakes by their markings. 根据蛇身上的斑纹就能把┹蛇同其他蛇类区别开来。 来自辞典例句
2 prey g1czH     
n.被掠食者,牺牲者,掠食;v.捕食,掠夺,折磨
参考例句:
  • Stronger animals prey on weaker ones.弱肉强食。
  • The lion was hunting for its prey.狮子在寻找猎物。
3 physicists 18316b43c980524885c1a898ed1528b1     
物理学家( physicist的名词复数 )
参考例句:
  • For many particle physicists, however, it was a year of frustration. 对于许多粒子物理学家来说,这是受挫折的一年。 来自英汉非文学 - 科技
  • Physicists seek rules or patterns to provide a framework. 物理学家寻求用法则或图式来构成一个框架。
4 jaw 5xgy9     
n.颚,颌,说教,流言蜚语;v.喋喋不休,教训
参考例句:
  • He delivered a right hook to his opponent's jaw.他给了对方下巴一记右钩拳。
  • A strong square jaw is a sign of firm character.强健的方下巴是刚毅性格的标志。
5 jaws cq9zZq     
n.口部;嘴
参考例句:
  • The antelope could not escape the crocodile's gaping jaws. 那只羚羊无法从鱷鱼张开的大口中逃脱。
  • The scored jaws of a vise help it bite the work. 台钳上有刻痕的虎钳牙帮助它紧咬住工件。
6 vibrations d94a4ca3e6fa6302ae79121ffdf03b40     
n.摆动( vibration的名词复数 );震动;感受;(偏离平衡位置的)一次性往复振动
参考例句:
  • We could feel the vibrations from the trucks passing outside. 我们可以感到外面卡车经过时的颤动。
  • I am drawn to that girl; I get good vibrations from her. 我被那女孩吸引住了,她使我产生良好的感觉。 来自《简明英汉词典》
7 scampering 5c15380619b12657635e8413f54db650     
v.蹦蹦跳跳地跑,惊惶奔跑( scamper的现在分词 )
参考例句:
  • A cat miaowed, then was heard scampering away. 马上起了猫叫,接着又听见猫逃走的声音。 来自汉英文学 - 家(1-26) - 家(1-26)
  • A grey squirrel is scampering from limb to limb. 一只灰色的松鼠在树枝间跳来跳去。 来自辞典例句
8 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
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