Primary standard — an ambient airpollutionstandard designed to protect human health.
基本标准——一个旨在保护人类健康的周围空气污染级别。
2
Many factories were over measure produced the smog that had over the standard and the smog seriously influence the air become air pollution.
许多工厂测量产生的烟雾对标准和烟雾严重影响空气成为空气污染。
3
To formulate an adaptable motor vehicle exhaust emission standard is one of the important events of airpollution control according to domestic and foreign experience.