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来源:雅诚德英语网
Its flattened shape implies that Iapetus once spun very quickly, completing a rotation in 16 hours.
它扁平的形状意味着土卫八曾经旋转得非常快,完成一次自转需要16个小时。
Its flattened shape implies that Iapetus once spun very quickly, completing a rotation in 16 hours.
它扁平的形状意味着土卫八曾经旋转得非常快,完成一次自转需要16个小时。