史前时代人们狩猎时，为求取食物而登山涉水。

In the Prehistoric era, people had to swim across the river for food.

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中国古书里，关于史前时代的传说是丰富多彩的。

There is a world of prehistoric legends in ancient Chinese books.

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中国古书里，关于史前时代的传说是丰富多彩的。

There is a world of prehistoric legends in ancient Chinese books.

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