嘿嘿，这个比喻深入浅出，坛子里的姐妹们一听就明白 :D

来源: putengtu 于 2015-03-01 16:08:45 [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.