收集了2006年《重点城市空气质量日报》中中国86个重点城市空气质量主要分析指标——空气污染指数（A PI）、首要污染物、空气质量级别，并对数据进行统计分析。
Analyze the main index, which include API, primary pollutant, air quality level, in 86 cities of china from Urban Ambient Air Quality Daily Report of 2006.
当地媒体报道说，北京星期五的空气质量指数超过了300AQI，达到了“危险”的级别。
Local media reported that the air in Beijing on Friday pushed past 300 AQI on the air Quality Index, a level deemed 'hazardous'.
当地媒体报道说，北京星期五的空气质量指数超过了300AQI，达到了“危险”的级别。
Local media reported that the air in Beijing on Friday pushed past 300 AQI on the air Quality Index, a level deemed 'hazardous'.
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