關鍵是質量問題。很多教課的都不是正職教授。對於做科研競賽的學生，pre college是雞肋。

來源: TigerLady 於 2024-07-04 06:59:04 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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