我很怀疑Sample 是否有代表性

来源: biglow 于 2008-02-04 12:27:11 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

或说Sample 是被选择过的.

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.