因此车辆上的乘客所面对的空气污染密度比骑车人要高2 - 4倍，污染物不同，程度也不一样。
Hence vehicle occupants are exposed to air with pollutant concentrations 2-4 times higher than that breathed by vehicle occupants, depending on the type of pollutant.
因此车辆上的乘客所面对的空气污染密度比骑车人要高2 - 4倍，污染物不同，程度也不一样。
Hence vehicle occupants are exposed to air with pollutant concentrations 2-4 times higher than that breathed by vehicle occupants, depending on the type of pollutant.
应用推荐