Today we visit the Nile River valley to explore one of the greatest civilizations in human history.

今天我们造访尼罗河大峡谷，来探索人类最伟大的文明之一。

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This is, if one of the most prosperous civilizations in human history is to be believed, will be the last day of humans.

也就是说，如果我们相信人类历史上最繁荣的文明，这一天将是人类的最后一天。

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In human history, many ancient and splendid civilizations were born and died. China is the only country with uninterrupted human civilization.

在人类历史上，许多古老和灿烂文明由诞生到死亡，而中国是人类文明唯一没有中断的国家。

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