而空气质量健康指数（AQHI）是以人体健康为本的通报系统。它以臭氧、二氧化氮、二氧化硫、PM10、PM2.5粒子，三小时的平均浓度，参考世界卫生组织最严指标，评...
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空气质量指数的范围从0到500，上限500表示空气质量最不健康。
The Air Quality Index runs from zero to 500, with 500 being the most unhealthy.
空气质量指数超过100对敏感人群不健康。敏感人群指的是患有哮喘和心脏疾病的人。
Anything over 100 could be considered unhealthy for sensitive groups. We're talking about people with asthma as well as heart conditions.
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