At the same time, rapid and smooth vehicles and reduce engine idling caused by air pollution.

同时，快速而又流畅的车辆还会镌汰由发动机怠速导致的氛围污染。

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At the same time, rapid and smooth vehicles and reduce engine idling caused by air pollution.

同时，快速而又流畅的车辆还会镌汰由发动机怠速导致的氛围污染。

youdao