北京は風が吹くと大気が綺麗になります。今日は朝から強い風。“@BeijingAir: 11-27-2013 19:00; PM2.5; 10.0; 42; Good (at 24-hour exposure at this level)”
11-27-2013 19:00; PM2.5; 10.0; 42; Good (at 24-hour exposure at this level)
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