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5665 篇文章
He doesn't just use his to catch crabs.
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He doesn't just use his to catch crabs. 它不光用颌来抓螃蟹

Others to attract a mate.
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Others to attract a mate. 有的鱼用颌来吸引配偶

Some fish use them to protect their eggs.
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Some fish use them to protect their eggs. 有的鱼用颌来保护自己的卵

But there is more to jaws than that.
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But there is more to jaws than that. 但是颌的作用不止于此

The pairing of backbones with jaws was to prove a winning combination.
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The pairing of backbones with jaws was to prove a winning combination. 颌搭配脊椎是胜利的组合

the juvenile's jaws are not yet strong enough to break its shell.
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the juvenile's jaws are not yet strong enough to break its shell. 幼鱼的颌尚不够强大 无法咬破它的壳

As it starts to circle...
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As it starts to circle... 它开始绕圈

Just what it needs to outmaneuver the young fish.
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Just what it needs to outmaneuver the young fish. 刚好能够摆脱这条年轻的鱼

Dunkleosteus has the pace to catch up with them.
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Dunkleosteus has the pace to catch up with them. 邓氏鱼的速度能够追上菊石

there was to be a changing of the guard.
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there was to be a changing of the guard. 即将发生权力转移