他说,机动车污染也对这些石头造成影响。
机动车污染不仅会损伤肺功能,而且会加速血管硬化。
It found “evidence of a causal relationship, ” but not proof of one, between pollution from vehicles and impaired lung function and accelerated hardening of the arteries.
机动车污染已成为城市大气污染的主要污染源之一。
Motor Vehicle pollution has been one of the main pollution sources in city air pollution.
And of course, there are still pollution problems with motorists.
当然,机动车的污染问题依然很严重。
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