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jan 1, 249451056 BC - 翼龙出现 第一种会飞的脊柱动物 为什么会出现飞翔的功能，这个过程是如何演化出来的？

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地球地质年代表

By徐康
8 Feb 2020
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jan 1, 249451056 BC
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~ 5883516 years ago

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