赛先生和德先生的成分都有。但这种交流越来越趋向于双向的了

来源: 金笔于 2010-10-31 11:58:50 [博客] [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.