天气热起来以后很少有这么不好的空气了呢 RT@BeijingAir: 06-02-2013 12:00; PM2.5; 231.0; 281; Very Unhealthy (at 24-hour exposure at this level)
06-02-2013 12:00; PM2.5; 231.0; 281; Very Unhealthy (at 24-hour exposure at this level)
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