我北京的家人也說北京空氣最差的兩年已經過去了，在不斷進步。本來我悲觀以為治理至少需要30年。

來源: nasastar 於 2017-05-24 02:28:38 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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