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SSS 2008-02-14

时间:2010-05-13 02:33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 American's 60-Second Science .I'm Cynthia Graber. This'll just take a minute.

It's Valentine's Day, even for barnacles which are stuck to rocks. But evolution has endowed these stationary1 creatures with some curious abilities according to/ research published online in The Proceedings2 of the Royal Society. Male barnacles have members that can stretch to eight times their body length to reach a similarly stuck female. They have other problems though, strong waves in tides. Scientists at Canada's University of Alberta discovered that barnacles cope with this challenge by developing differently shaped genitalia. Barnacles that cling to rocks on wave-exposed shores have shorter, wider organs so they can maintain control in violent waters . Those that are living in coast protected from crushing waves have longer slimer ones. Researchers transplanted young barnacles living in protected coasts to unprotected ones and vice3 versa. And the animals developed accordingly. For example, barnacles from calm areas that were moved to turbulent seas grew shorter wider members. This experiment shows that barnacles can develop their digit4 to suit local conditions and reach through churning waters to connect with someone special.

Thanks for the minute for Scientific American's 60-Second Science. I'm Synthia Graber.
 


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1 stationary CuAwc     
adj.固定的,静止不动的
参考例句:
  • A stationary object is easy to be aimed at.一个静止不动的物体是容易瞄准的。
  • Wait until the bus is stationary before you get off.你要等公共汽车停稳了再下车。
2 proceedings Wk2zvX     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
3 vice NU0zQ     
n.坏事;恶习;[pl.]台钳,老虎钳;adj.副的
参考例句:
  • He guarded himself against vice.他避免染上坏习惯。
  • They are sunk in the depth of vice.他们堕入了罪恶的深渊。
4 digit avKxY     
n.零到九的阿拉伯数字,手指,脚趾
参考例句:
  • Her telephone number differs from mine by one digit.她的电话号码和我的只差一个数字。
  • Many animals have five digits.许多动物有5趾。
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