238 篇文章
the first eagle must now continue its search.
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the first eagle must now continue its search. 第一只雕只能继续它的觅食之旅

So she must fight.
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So she must fight. 必须奋起一搏

Other scavengers must defer.
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Other scavengers must defer. 其它食腐者只能等着了

When she spots a chance, she must move fast.
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When she spots a chance, she must move fast. 一旦发现良机 必须快速行动

So to drink, an ibex family must descend into the valley...
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So to drink, an ibex family must descend into the valley... 为了饮水 羱羊必须下到

where life must be at its most resourceful,
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where life must be at its most resourceful, 生活在那儿必须足智多谋

Once a year, they must all return to the sea to breed,
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Once a year, they must all return to the sea to breed, 每年它们都会回到海洋中进行繁殖

They must join the adults at the edge of the sea.
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They must join the adults at the edge of the sea. 它们必须到海边与成年海鬣蜥汇合

To survive, they must find prey daily
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To survive, they must find prey daily 为了生存,它们必须每天寻找猎物

Somewhere, beneath the surface below, there is the food it must have.
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Somewhere, beneath the surface below, there is the food it must have. 水下某个地方一定有食物