This is because the reduced SO2 may simply free another pollutant, ammonia, to react instead with abundant NOX creating ammonium nitrate particles.

因为二氧化硫虽然减少了，另外一种被释放出来的污染物——氨，却通过大气化学反应生成了大量的硝酸氨颗粒。

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The scattered blue particles are cupric nitrate and zinc nitrate, a byproduct of the chemical reaction.

略带蓝色的部分是硝酸铜和硝酸锌，一种化学反应后的产物。

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Monodispersed NiO precursor particles were prepared by homogeneous precipitation from nickel nitrate solution in the presence of urea.

采用尿素均相沉淀法制得了均分散的氧化亚镍前驱体粒子。

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These can be sulfate,nitrate, ammonia,sodium chloride and if these are small particles they can be dangerous because if they are inhaled they can reach the lungs."

VOA: standard.2010.04.16