nitrogen dioxide concentration

基本解释

High concentration of sulphur dioxide, nitrogen, oxides and dust have long been known to be harmful.
人们早已知道，二氧化硫、氮、氧化物和尘埃浓度高是有害的。
The square of coloring development length of the tube was directly proportional to the product of the nitrogen dioxide concentration and sampling time.
根据时间和显色长度可求出环境中二氧化氮的浓度。
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.
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。