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来源:雅诚德英语网
The surface formed mostly in the last billion years, which makes it fresher and more recently active than any rocky planet other than earth.
它的表面大部分是在过去十亿年里形成的,使得它比地球以外的任何岩石行星都更新鲜活跃。
The surface formed mostly in the last billion years, which makes it fresher and more recently active than any rocky planet other than earth.
它的表面大部分是在过去十亿年里形成的,使得它比地球以外的任何岩石行星都更新鲜活跃。