哈哈哈，還號稱“老師”。第一宇宙速度7.9km/s，每天有86,400s, 月球與地球的距離是380,000公裏。。。

來源: 唐宋韻於 2024-05-18 12:40:35 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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