可下麵的人都說照葫蘆畫瓢就行.

來源: expectingMM 於 2012-11-12 20:23:31 [舊帖] [給我悄悄話] 本文已被閱讀：次

我想等到學偏微分方程時, 照葫蘆畫瓢都不好畫呀.

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