仰るように、現在、北京の大気は極めて健康に悪い。RT @Braveymithra @BeijingAir 06-30-2013 07:00; PM2.5; 190.0; 240; Very Unhealthy (at 24-hour exposure at this level)
06-30-2013 07:00; PM2.5; 190.0; 240; Very Unhealthy (at 24-hour exposure at this level)
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ってか、清浄な大気のほうが「盆と正月」ほど稀ですが。RT
@Braveymithra@BeijingAir
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