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di qiu huan neng huo duo jiu
Author(s): 
Pages: 54
Year: Issue:  10
Journal: Youths Science

Abstract: <正>这是否是耸人听闻?据华盛顿大学的科学家推断,今天的地球可以说正值壮年期,是动植物生长繁衍的天堂乐园,然而这个蓝色的星球再过5亿年,就将走到生命的终点。
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