and

4265 篇文章
and allows one male... to approach.
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and allows one male... to approach. 允许一头雄鲸靠近

so she can judge their strength and stamina.
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so she can judge their strength and stamina. 以便雌鲸能够评估自己的力量和耐力

And being warm-blooded,
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And being warm-blooded, 而且由于是温血动物

and able to breathe once more.
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and able to breathe once more. 又能呼吸了

and it's in no hurry to make its move.
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and it's in no hurry to make its move. 而且它并不急于行动

and in the coming darkness.
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and in the coming darkness. 能够带来安全

Faster and stronger than bats...
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Faster and stronger than bats... 比蝙蝠更快更强壮

and gather in their millions.
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and gather in their millions. 并且可以成千上万只聚在一起

One branched out and went in an entirely different direction.
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One branched out and went in an entirely different direction. 有一个分支 朝一个完全不同的方向发展

his cubs will leave their mother and start to hunt alone,
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his cubs will leave their mother and start to hunt alone, 它的幼崽将离开母亲 开始独自捕猎