primary pollutant

The power plants are the primary entities that emit pollutant.

发电企业是我国污染物排放大户.

this study suggested the primary pollutant which should be controlled was pm2. 5 to increase the visibility in beijing.

研究的结果提示提高北京地区大气能见度，需要控制的首要污染物为PM2.

primary pollutant discharge has been brought under effective control, the environmental quality has been improved significantly.

主要污染物排放得到有效制约，生态环境质量明显改善。

Analyze the main index, which include API, primary pollutant, air quality level, in86 cities of china from Urban Ambient Air Quality Daily Report of2006.

收集了2006年《重点城市空气质量日报》中中国86个重点城市空气质量主要分析指标&空气污染指数（A PI）、首要污染物、空气质量级别，并对数据进行统计分析。

A pollutant Also known as the " primary pollutants. "

一次污染物又称 “ 原生污染物 ”.

The coal-fired power plants are the primary entities that emit pollutant.

火力发电 企业是我国污染物排放大户.