烟雾smog;

　　空气污染指数air pollution index;

　　橙色预警orange alert;

　　悬浮颗粒物airborne particulate matter;

　　可吸入颗粒物inhalable particle;

　　有毒物质toxic substance;

　　空气质量检测air quality monitoring;

　　实时发布PM2.5数据release real-time PM2.5 data