沒用。個案說明不了什麽問題。除非有大量的數據對比。其實不必雙胞胎，一般留學生就可以與在國內的同學對比。

來源: asiancarp 於 2016-01-29 16:35:43 [舊帖] [給我悄悄話] 本文已被閱讀：次

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