例如，DNA研究就显示古代人类的祖先也曾进行杂交，尼安德特人的基因很可能已被我们的基因库所吸收，而他们做为不同的原始人类物种却已经消失。
DNA studies, for example, suggest that our ancient human ancestors interbred, with Neanderthals possibly being absorbed into our gene pool and disappearing as their own distinct hominid species.
没有人知道我们的哪个古代原始祖先首先开始使用火。
No one knows what ancient savage ancestor of ours first begin to make use of fire.
在古代的中国，黄色代表土地——而我们的祖先长久以来一直认为地球就是宇宙的中心。
To the ancient Chinese, yellow represents earth - and the earth, which for a long time was considered the center of the universe by our ancestors.
我国古代职官制度是我们祖先留下的一份宝贵的文化财富。
The official system in our country in ancient times is a cultural treasure left by our ancestors.
在古代的时候，做工粗糙的衣物可以保护我们的祖先不被动物咬伤，防止他们受伤。
In ancient times, rough garments protected our ancestors from animal bites and kept them from being hurt.
他声称，他已破译的信息预警留给我们的我们的祖先在金字塔，在玛雅日历，丹达腊十二生肖的纳斯卡线，古代神话和传说。
He claims that he has deciphered the messages of warning left for us by our ancestors in the pyramids, in the Mayan calendar, Dendera Zodiac, the Nazca lines, and the ancient myths and legends.
他声称，他已破译的信息预警留给我们的我们的祖先在金字塔，在玛雅日历，丹达腊十二生肖的纳斯卡线，古代神话和传说。
He claims that he has deciphered the messages of warning left for us by our ancestors in the pyramids, in the Mayan calendar, Dendera Zodiac, the Nazca lines, and the ancient myths and legends.
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