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for up to an hour.
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for up to an hour. 长达一小时

is to haul themselves up onto the beach where they were born
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is to haul themselves up onto the beach where they were born 就是要爬上它们出生的海滩

before she's big enough to stand up for herself.
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before she's big enough to stand up for herself. 才能长到足够强大 能够保护自己

for up to 15 minutes.
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for up to 15 minutes. 长达15分钟

Water seeping up through the ground.
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Water seeping up through the ground. 水从地下渗出

they made up three-quarters of all vertebrate life on land,
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they made up three-quarters of all vertebrate life on land, 它们占据了陆地脊椎动物的四分之三

...in a crust up to three kilometers deep.
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...in a crust up to three kilometers deep. 表层厚达三千米

His brain can't keep up.
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His brain can't keep up. 它的大脑跟不上

If scaled up to human proportions,
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If scaled up to human proportions, 如果按照人类的比例放大

They now make up over 80% of all animal species.
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They now make up over 80% of all animal species. 节肢动物 如今已占据所有动物物种的80%以上