我勒个去 我没看错吧 12!!! 前半天还200多呢 RT @BeijingAir: 10-19-2013 16:00; PM2.5; 12.0; 50; Good (at 24-hour exposure at this level)
10-19-2013 16:00; PM2.5; 12.0; 50; Good (at 24-hour exposure at this level)
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