而且，水汙染是全球性的。霧霾可能是區域性的。

來源: soundofsilence 於 2015-03-02 14:30:04 [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.