它们为下述选定的空气污染物的浓度限值提出了修订：可吸入颗粒物(PM)、臭氧(o3)、二氧化氮(NO2)和二氧化硫(SO2)，适用于世卫组织所有区域。
They recommend revised limits for the concentration of selected air pollutants: particulate matter (PM), ozone (O3), nitrogen dioxide (NO2) and sulfur dioxide (SO2), applicable across all WHO regions.
煤、燃油和汽油燃烧时产生的废气中含有二氧化硫和二氧化氮。
The waste gases coming from burning coal, oil and petrol include sulphur dioxide and nitrogen dioxide.
最后，炼油厂排放很多的气体，如二氧化硫(SO2)、二氧化氮(NO2)、二氧化碳、一氧化碳、甲烷、双环氧乙烷、氟化氢、氯、苯和其他气体。
Finally, refineries emit many gases like sulphur dioxide (SO2), nitrogen oxide (NO2), carbon dioxide, carbon monoxide, methane, dioxins, hydrogen fluoride, chlorine, benzene and others.
二氧化氮(NO2)和二氧化硫(SO2)是主要的空气污染物与呼吸道感染发病率增加有密切关系。
The nitrogen dioxide (NO2) and the sulphur dioxide (SO2) is the main air pollutant and the respiratory tract infects the disease incidence rate increase to have the close relation.
这些颗粒物大多为发电厂、汽车工业和汽车尾气排出的二氧化硫和二氧化氮。
They are mostly sulfur dioxide and nitrogen dioxide from power plants, auto exhausts and industry.
对铁岭市2006年和2007年的环境空气质量进行对比分析，其中包括大气质量综合污染指数、可吸入颗粒物、二氧化硫和二氧化氮、降尘等指标的统计分析。
Comparative analysis of air quality indexes between the year of 2006 and 2007 of Tieling is conducted including air quality comprehensive pollution index and PM10 and SO2 and NO2 and fall dust.
本文就洛阳市春节期间燃放烟花爆竹的情况进行了空气质量监测，对可吸入颗粒物、二氧化硫、二氧化氮的浓度进行了相关分析。
We monitored air quality of Luoyang city During Spring Festival when fireworks were fired, and analysed concentration of PM10, SO2 and NO2.
该雷达系统能监测四种大气污染物，即大气气溶胶、二氧化硫、二氧化氮和臭氧。
This lidar system allows three-dimensional measurements by using a steering unit, and can measure four kinds of pollutants in atmosphereaerosol, SO 2, NO 2, and O 3.
该雷达系统能监测四种大气污染物，即大气气溶胶、二氧化硫、二氧化氮和臭氧。
This lidar system allows three-dimensional measurements by using a steering unit, and can measure four kinds of pollutants in atmosphereaerosol, SO 2, NO 2, and O 3.
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