You find it in datable places and that's why we can give this some kind of date, such as in Egypt.

你会发现它属于一个可确定年代的地区,这正是可甄别此文明所属年代的原因,例如在埃及

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We can do that by intercepting our observation with the date base and knowledge we required, the whole color map.

通过截取我的观察结果,分析数据库，所需的知识，以及整个彩色图画。

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