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di qiu 2.0 huan you duo yao yuan ?
Author(s): 
Pages: 16-21
Year: Issue:  10
Journal: Knowledge is Power

Abstract: 今年7月,美国国家航空航天局(NASA)召开新闻发布会,宣布发现了迄今为止与地球最为相似的系外行星——开普勒-452b.许多人为这个消息感到振奋,似乎我们已经接近几千年来所梦想的目标——发现“另一个地球”.
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