鯨魚睡覺嗎?Do Whales Sleep?
文章來源:未知 文章作者:enread 發布時間:2020-03-17 07:45 字體: [ ]  進入論壇
(單詞翻譯:雙擊或拖選)
鯨魚是哺乳動物,因此在很多方面它們和人類很像。最重要的區別是鯨魚和人類的生活環境不同。那么鯨魚睡覺嗎?鯨魚是如何睡覺的的呢?
Whales are mammals, so in many ways, they are just like human beings. The most important difference is that humans and whales live in different environments and whales have a special respiratory system that enables1 them to stay underwater for several minutes without breathing oxygen. For this reason, they are said to be voluntary breathers. That is, because of whales underwater environment, they must be conscious breathers. They think about every breath they take and come up to the surface of the water to breathe through blowholes on top of their heads.
 
What is outstanding about whales is the way they can sleep. While all mammals sleep, whales cannot afford to become unconscious for long because they may drown. The only way they can sleep is by remaining partially2 conscious. It is believed that only one hemisphere3 of the whale's brain sleeps at a time, so they rest but are never completely asleep. They can do so most probably near the surface so that they can come up for air easily.


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1 enables 5bbe727a82109d77599a648e779d2e09     
v.使能夠,提供做…的權利[措施]( enable的第三人稱單數 );使可能
參考例句:
  • The software enables you to access the Internet in seconds. 這種軟件使你在幾秒鐘內便可訪問互聯網。
  • This pass enables me to travel half-price on trains. 我用這張通行證可以半價乘火車。 來自《簡明英漢詞典》
2 partially yL7xm     
adv.部分地,從某些方面講
參考例句:
  • The door was partially concealed by the drapes.門有一部分被門簾遮住了。
  • The police managed to restore calm and the curfew was partially lifted.警方設法恢復了平靜,宵禁部分解除。
3 hemisphere xy4yd     
n.半球,半球地圖
參考例句:
  • This animal is to be found only in the Southern Hemisphere.這種動物只有在南半球才能找到。
  • In most people,the left hemisphere is bigger than the right.多數人的左腦比右腦大。
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