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How big is 月球?
3,500 קילומטרים!
月球, 又称月亮"Luna", 是夜空里最闪亮的天体. 每 27 天 7 小时 43 分绕行地球一圈. 想像好几个月球在夜空里绕行, 一定很神奇!
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