The plane would have a hard time slowing down to land when the engine was idling too.
这架飞机将很难放缓的土地时，发动机空转了。
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。
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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