数据来源于第谷星表，100光年以外的恒星则采用非常近似的数值。

This is taken from the Tycho catalog and for stars further away than 100 light years or so should be taken as a very approximate figure.

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它们所处的那个年代，古埃及人类们还只是形成规模不大的农耕小村落，零星地散布在尼河罗谷上。

They come from a time when Egypt was populated only by small farming communities living along the Nile Valley.

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这张太空图片揭示了沿着巴西的Matto Grasso州的星谷河的砍伐和烧毁状况。

This astronaut photograph illustrates slash-and-burn forest clearing along the Rio Xingu (Xingu River) in the state of Matto Grasso, Brazil.

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