汙染源如果在北京,那北京應該天天都是灰霾.

來源: 看熱鬧的北京人於 2013-10-06 22:00:50 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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