这是个什么词?335后边那个,求英语帝 RT @BeijingAir: 11-27-2012 20:00; PM2.5; 285.0; 335; Hazardous (at 24-hour exposure at this level)
11-27-2012 20:00; PM2.5; 285.0; 335; Hazardous (at 24-hour exposure at this level)
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@Pazzilivo 有害的啊。。。随便查下就知道啊
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