老哲學家玩不了學過後微積分裏的極限理論的學子。那個瞬間是極限狀態，是一點，但是極限本身是一個過程: )

來源: 天台坐客於 2021-10-29 14:49:00 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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