To reduce automobile emission pollution, many countries lay down emission control regulation of automobile diesel engine.
为减少汽车带来的排气污染，许多国家均对车用柴油机制定了相应的排放法规。
Automobile harmful pollution emission are rather serious in our country.
汽车有害排放污染在我国已相当严重。
Following with the sustainable growth of the automobile, its emission has been the major pollution to the air.
随着汽车保有量的不断增加，汽车排放已成为当今大气最主要的污染源。
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