有机污染物降解过程中的次生污染物问题；
The secondary pollutants in the process of degradation of organic chemicals;
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。
Appropriately, a higher concentration of the secondary pollutant is stably held for a longer downwind distance.
结论：饮水机存在次生污染情况，使用饮水机应适时清洗，并建议饮用加热的沸水，有效防止饮水中毒事件的发生。
Conclusion:Secondary pollution exists in drinking water machine; clean drinking water machine regularly and drink boiled water are suggested to prevent poisoning events induced by drinking water.
Jimenez说在墨西哥城进行的研究显示次生气溶胶占颗粒物污染的三分之二，但早些时候在洛杉矶的研究结果与之相反。
Research in Mexico City suggested that secondary aerosols made up two-thirds of particulate pollution, but earlier studies in Los Angeles showed the reverse, Jimenez says.
被污染的水源可以被清洁；人类造成的荒漠可以再次生机盎然。
Polluted water can be cleaned; man-made deserts can bloom again.
云南省矿产资源开发中，存在占地面积大，固体废弃物污染水体和加剧次生地质灾害等环境问题。
The problems of large occupation area, solid waste polluting water as well as intensifying secondary geological disaster are existing in the development of the mineral resource in Yunnan Province.
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。
The sets of diffusion equations are presented for reactive pollutant from a time -varied point source and secondary pollutant formed by the transformation.
但是在人类第一次生火，在河里洗他们的衣服和扔垃圾在地面上之后，他们开始污染自己的家园。
But man began to pollute their home after he first made a fire, washed his clothes in the river and threw dirty things on the ground.
但是在人类第一次生火，在河里洗他们的衣服和扔垃圾在地面上之后，他们开始污染自己的家园。
But man began to pollute their home after he first made a fire, washed his clothes in the river and threw dirty things on the ground.
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