“ 兩端之間上下更無一點”，不知可不可以這樣理解：兩個端點（包括之間）的上麵的點和下麵的點，它們都不在這個直線上。

來源: youdecide 於 2023-12-22 13:32:02 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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