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　　海洋生物有趣的睡覺習慣

Marine Animals Have Interesting Sleeping Habits

海洋生物有趣的睡覺習慣

Many people know that marine mammals, like whales, porpoises and dolphins, breathe air, like we do. But, many people don’t know that marine mammals have developed some interesting sleeping habits in order to accomModate their regular trips up to the surface for air. Today, A Moment of Science looks at what its like to sleep with the fishes.

大多數人都知道些海洋哺乳動物，比如鯨魚，鼠海豚和海豚。它們和我們一樣都要呼吸空氣。但是大多數人都不知道這些哺乳動物已經養成了一些有趣的睡眠習慣，以配合來回水面呼吸空氣。今天，科學一刻將探究一下，這些哺乳動物是如何像魚類一樣睡覺的。

No Sleep Tonight

今夜無眠

Unlike our own breathing, which does not require conscious effort, marine mammals must consciously go to the surface of the water to breathe through a blowhole on top of their heads. Because of this, marine mammals don’t sleep for a solid 8 hours a night, the way we do.

與人類“無意識”呼吸不同，這些動物必須到水面，通過頭頂的氣孔，進行“有意識”的呼吸。因此，它們不像我們，每晚能夠穩定的睡上八小時。

Some marine mammals sleep while swimming. Whales nap for brief periods while swimming alongside an alert friend who guides them. In fact, young whales must sleep alongside their mother because the mother’s slipstream actually pulls the calf along: it will sink if the mother stops.

有些海洋哺乳動物邊睡覺邊遊動。對於鯨魚，只要有同伴放風，並引導着，他們就會邊遊邊打會個盹。實際上，幼鯨必須在母鯨身邊睡覺，因爲母鯨遊動時產生的水流可以推動幼崽向前：如果母鯨停止遊動，幼崽就會沉下去。

Dolphin

海豚

Other marine mammals, like dolphins, sleep while floating on the surface of the water or take short catnaps while floating below the surface. Researchers claim that while marine mammals sleep their brain is always partially alert. Aside from these brief naps, dolphins are active most of the night.

而其它海洋哺乳動物，像海豚，睡覺的時候是浮在水面上，打盹的時候就浮在水面下。研究表明，海洋哺乳動物睡覺時，他們部分大腦依然保持警覺。海豚在晚上，除了打盹，其餘時間都處於活躍狀態。

Of course, marine mammals are equipped to handle underwater sleeping. They have proportionately larger lungs, exchange air more fully at each breath, and carry more oxygen in their blood than we do, so they can hold their breath long enough to sleep with the fishes.

當然，也有些海洋哺乳動物具備水下睡覺的能力。相應地，他們的肺都很大，每次呼吸都能換進更多的空氣。他們的血液中的含氧量就比我們的高，這樣他們就能長時間屏息，像魚類一樣睡覺。

　　飛鳥集

What you are you do not see. What you see is your shadow.

你無法看到自己，

你看到的是你認爲的自己。

Sorrow is hushed into peace in my heart like the evening among the silent trees.

憂思在我心裏平靜下去，

正如黃昏在寂靜的林中。

Beauty, find theyself in love, not in the flattery of the mirror.

啊，美呀，

在愛中找你自己吧，

不要到你鏡子的諂諛中去找呀。

Once we dreamed that we were wake up to find that we were dear to each other.

做夢時，

我們距離非常遙遠，

醒來時，

我們再彼此的視野裏取暖。

That I exist is a perpetual surprise which is life.

我存在，

是生命綿延不斷的精彩。