你根本不需要數學。你問老棉農，他回個加減法完全就夠了。在複雜的找會計師得了。不是嗎？他要學微積分？嗬嗬。

來源: 知人知麵於 2015-04-26 11:44:37 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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