污染定义

pollution control───[环境]污染控制

precise definition───[计]精确定义

dictionary definition───词典中的定义

high definition───[电视]高清晰度

legal definition───法律定义

muscle definition───肌肉定义

narrow definition───狭义解释

Definition, types, sources and current research progress of the indoor air pollution were illustrated.───了室内空气污染的定义、种类、来源，国内外研究现状。

definition and characteristic of indoor air pollution as well as the source of major pollutants and their danger are introduced with measures for controlling indoor air pollution presented.───介绍了室内空气污染的定义、特点以及主要污染物的来源和危害，并提出了室内空气污染的控制。

It summarizes shortages of present water quality evaluate methods, and puts forward water pollution index evaluate methods, then explains detailedly its definition, calculate methods.───在总结分析现有水质评价方法的基础上，提出了水污染指数评价法，并对其定义、计算方法进行了详细介绍。