哈哈。。。"圓球"即便是三維也是有"麵積"的，不過這張圖裏麵的“球”指的是平麵的二維圖形

來源: nWAY 於 2013-10-11 09:08:27 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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