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