“@BeijingAir: 09-23-2013 10:00; PM2.5; 8.0; 33; Good (at 24-hour exposure at this level)” PM2.5の値が低いのは結構だけど、低いということは生産や物流が停滞してるってことでは?
09-23-2013 10:00; PM2.5; 8.0; 33; Good (at 24-hour exposure at this level)
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