相對而言，冬至、夏至、春分、秋分容易測算，地球繞太陽是橢圓軌道！古中國人怎會知道？連地球繞太陽都不知道

來源: 徐栩於 2023-02-01 19:37:57 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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