在线英语听力室

科学美国人60秒 SSS 2013-09-25

时间:2013-11-25 05:32:48

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(单词翻译)

 Cerumen, it's a lovely word a specially1 considering that's called ear wax. And we are not the only species that produce this stuff, some whales build up waxes along with lipids and carotene protein into what's called earplugs. And researchers now know that examining this  earplugs  tells them about whale's lifetime and exposure to pollution. Alternative layers of dark and light in the plugs corelate to the seasons feeling or migration,so the plugs are used to determine a whale's age, think treeings. In the latest study scientist analysed the earplug of an endangered blue whale killed by a ship near California. They found that levels of stress for months doubled over the whale's life. They also found evidence that the whale has been exposed to plasticize such as DDT with a highest level during the whale's first six months of live. The whale was likely exposed to the plasticize in his mother's milk.

They also found a couple of peaks of exposure to mercury. The study is in the preceding of national academic sciences. Future earplugs should offer additional clues about whales' lives, so look for researchers to give new attention to leviathan remain.

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1 specially Hviwq     
adv.特定地;特殊地;明确地
参考例句:
  • They are specially packaged so that they stack easily.它们经过特别包装以便于堆放。
  • The machine was designed specially for demolishing old buildings.这种机器是专为拆毁旧楼房而设计的。

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