Changes in sensory perception are the most sensitive indicators of the presence of nitrogen dioxide.

感觉的改变是二氧化氮存在的最灵敏的标志.

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Researchers also blamed exposure to nitrogen dioxide, carbon monoxide and particulates for the increase.

研究人员还指责了二氧化氮, 一氧化碳和颗粒物的增加问题.

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A portable on - spot measurement of nitrogen dioxide instrument was developed based on photometry.

研制了一种基于光度法现场测定大气二氧化氮的便携式仪器,开发了相应的控制软件.

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The NO 2 concentration in Guangzhou, Beijing and Shanghai was comparatively fairly high.

广州 、 北京、上海等特大城市,二氧化氮浓度相对较高.

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