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http://www.greenpeace.org/eastasia/news/blog/beijing-air-laced-with-the-heavy-metal-arson/blog/45509/
您即将离开知乎,请注意您的帐号和财产安全。
http://www.greenpeace.org/eastasia/news/blog/beijing-air-laced-with-the-heavy-metal-arson/blog/45509/