目前它是欧洲最为令人关切的空气污染物之一。
In Europe it is currently one of the air pollutants of most concern.
是，它一个主要的空气污染物。
机动车排放颗粒物是重要的空气污染物。
Particles from vehicle emission are important air pollutants.
即将到来的关于空气污染物的管理规则就让他们很担心。
Forthcoming rules on air pollutants, for example, worry them a lot.
为汽车乘务舱空气污染物光净化技术的进一步研究奠定了基础。
It lays a foundation for the further research on air pollutants purification technology.
有毒有害空气污染物的环境影响是国内外研究的热点，而机动车排放是其重要源之一。
Studying the environmental effects of toxic air pollutants is currently very important in the world.
例如，炎热天气和上升的空气有助空气污染物消散； 降雨可冲走空气中部份的污染物；
For instance, hot weather and rising air can help dispersion of air pollutants ;
空气污染主要污染物为可吸入颗粒物。
Particulates were still the major pollutant that affected the air quality.
当前我国空气污染问题日益严峻，汽车排放有害污染物是污染的重要来源。
Now the pollution become more serious, the exhaust of the car is the main source.
当前我国空气污染问题日益严峻，汽车排放有害污染物是污染的重要来源。
Now the pollution become more serious, the exhaust of the car is the main source.
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