用英文来解释：Earth,Mars,galaxy
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用英文来解释：Earth,Mars,galaxy
答案
Earth x05The third planet from the sun,having a sidereal period of revolution about the sun of 365.26 days at a mean distance of approximately 149 million kilometers (92.96 million miles),an axial ro...
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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