Primary standard — an ambientair pollution standard 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
The reference for formulating Chinese environmental quality standards is provided by analyzing the formulating procedure and process on ambientair quality standard in EC.
通过分析欧盟环境空气质量标准的制订过程,为我国环境质量标准的制订提供参考与借鉴。
3
In 2004, 210 cities exceeded the Class 2 limit values of the National AmbientAir Quality Standard (NAAQS) within the total 342 monitored cities.