點沒有長度，線也不是由點構成的。這樣就沒有矛盾啦。所以分別“定義”點，線，及兩線可以交於一點。也祝您聖誕快樂！

來源: 露重煙微於 2023-12-24 23:34:00 [舊帖] [給我悄悄話] 本文已被閱讀：次

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