先週の金曜日から何故か急激に悪化してます。各工場、国慶節休み前の駆込み操業が原因か?“@BeijingAir: 09-29-2013 06:00; PM2.5; 226.0; 276; Very Unhealthy”
09-29-2013 06:00; PM2.5; 226.0; 276; Very Unhealthy (at 24-hour exposure at this level)
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