次生气溶胶最初以气体形态出现，在大气中发生化学反应从而形成颗粒物。
Secondary aerosols begin life as gases and chemically react in the atmosphere to form particles.
这次生物大灭绝事件的发生似乎至少部分是因为大量的火山喷发，火山喷发将大量的二氧化碳喷到大气中。
At least part of the cause of this extinction seems to have been huge volcanic eruptions that poured carbon dioxide into the atmosphere.
由此可见，太行山天然次生林在维持大气中O2和CO2平衡、调节气候、净化空气等方面起着相当重要的作用。
Thus, the natural secondary forest in Taihang Mountain plays a very import role in maintaining the equilibrium of CO2 and O2, regulating climate, cleaning air and so on.
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.
当粒子撞击地球大气层时，它们就会产生次生粒子(称为介子)簇射。
When the particles crash into the Earth's atmosphere, they create showers of secondary particles called muons.
其中大气水淋滤形成的次生孔隙对异常高孔隙的贡献较小。
Among them, leaching of meteoric water has contributed less to the formation of anomalously high porosity zones compared to other factors.
其中大气水淋滤形成的次生孔隙对异常高孔隙的贡献较小。
Among them, leaching of meteoric water has contributed less to the formation of anomalously high porosity zones compared to other factors.
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