双向的：经济发展了才有钱搞高级交通；交通高级了就会有更好的经济。当然有极限。

来源: halfdummy 于 2014-08-02 15:56:19 [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.