In western countries, "second-hand fragrance" has been deemed a source of air pollution for a long time.
在西方一些国家，“二手香”早就被视为空气污染源之一。
According to a report issued in 2005 by the European Union, "ships are fast becoming the biggest source of air pollution in the EU."
欧盟在2005年发表的一份报告指出，“船只正在快速成为欧盟最大的空气污染来源。”
At the same time the vehicle exhaust has become the primary source of air pollution in big cities.
同时在我国大城市机动车排气污染已成为城市空气污染的主要源头。
The main source of air pollution of small particles in that region is the transformation of SO2 to sulfate aerosol.
气态污染物转化是该地区的细粒子空气污染的一个重要来源。
One important source of air pollution, generally believed, is cars, which emit a large amount of waste gases into the air.
一般来说，空气污染最重要的原因之一就是汽车所排放的大量尾气。
The second fugitive dust about vehicle is an important source of air pollution in northern city of China, the measure and calculation methods need to be developed and researched.
机动车行驶过程二次扬尘已成为中国北方城市扬尘污染的重要来源，有关机动车二次扬尘量化计算亟待研究开发。
This paper comprehensively stated source of air pollution and damage to human body health, introduce the research status from domestic and abroad, put forward the reckon method of economic losses.
针对空气污染的来源和对人体健康的危害作了详尽的阐述，介绍了国内外研究现状，提出了空气污染经济损失估算的方法。
This paper comprehensively stated source of air pollution and damage to human body health, introduce the research status from domestic and abroad, put forward the reckon method of economic losses.
针对空气污染的来源和对人体健康的危害作了详尽的阐述，介绍了国内外研究现状，提出了空气污染经济损失估算的方法。
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