居然刚刚回来的时候空气这么好,没呼吸到真是浪费了!“@BeijingAir: 03-27-2013 20:00; PM2.5; 15.0; 49; Good (at 24-hour exposure at this level)”
03-27-2013 20:00; PM2.5; 15.0; 49; Good (at 24-hour exposure at this level)
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