本來有單一（或少數）選擇性；突變後有了另外的選擇性；再突變再有另另外的選擇性 --那還選擇個x啊

來源: gu.qi 於 2020-04-09 09:42:17 [舊帖] [給我悄悄話] 本文已被閱讀：次

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