把公路污染源界定为移动污染源、固定污染源，临时污染源和伴生污染源；
The road pollutant sources are demarcated as moving, fixed, temporary and associate sources.
空气污染通常是与主要的固定污染源，但排放的最大来源是移动来源主要是汽车。
Air pollution is often identified with major stationary sources, but the greatest source of emissions is mobile sources, mainly automobiles.
空气污染通常是与主要的固定污染源，但排放的最大来源是移动来源主要是汽车。
Air pollution is often identified with major stationary sources, but the greatest source of emissions is mobile sources, mainly automobiles.
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