你把高等數學和初等數學弄混了。美國隻是一個思維方式不同，數數可能慢點，過分依賴計算器。

來源: jiangwen999 於 2015-07-23 07:09:32 [舊帖] [給我悄悄話] 本文已被閱讀：次

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