我觉得是必要的一步。这个叫做滴水不漏，无懈可击。

来源: sebastopol 于 2016-06-06 18:46:44 [旧帖] [给我悄悄话] 本文已被阅读：次

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