Appropriately, a higher concentration of the secondary pollutant is stably held for a longer downwind distance.

相应地，一个较高的次生污染物浓度将稳定地维持在一个较长的下风距离上。

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The sets of diffusion equations are presented for reactive pollutant from a time -varied point source and secondary pollutant formed by the transformation.

建立了一个点源排出的活性污染物以及其在大气中化学转化形成的次生物扩散方程。

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Cold plasma technology used for the decomposition of Volatile Organic Compounds (VOCs) has many advantages, such as high removal efficiency, none secondary pollutant producing and operating easily.

低温等离子体技术对挥发性有机物的去除具有去除率高、无二次污染物产生、易操作等优点，该技术的研究和应用受到广泛的关注。

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The government has had some success targeting primary pollutants, but analysts say it is just beginning to target secondary pollutant problems, including particulate matter that is harmful to human health.

WSJ: China's Pollution Fight Faces Resistance

"They're succeeding at some of the big but simpler problems and really just getting started on more complicated secondary pollutant problems, " said Chris Nielsen, another researcher on the project and executive director of Harvard's China Project, which focuses on the atmospheric environment.

WSJ: China's Pollution Fight Faces Resistance