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来源:雅诚德英语网
The Moon's mean density is much lower than that of Earth but is about the same as that of Earth's mantle.
月球的平均密度比地球低得多,但与地球的地幔密度大致相同。
The Moon's mean density is much lower than that of Earth but is about the same as that of Earth's mantle.
月球的平均密度比地球低得多,但与地球的地幔密度大致相同。