It also minimises the pumping losses caused by no longer having to "throttle" (ie, strangle) the air flowing into the cylinders in order to control the engine speed.
这样还把由于不必再为了控制引擎转速来抑制空气流入引起的抽吸效应的能耗最小化。
You control the amount of air that passes through the throttle plate and into the engine with the gas pedal.
通过油门踏板，你能控制经过节气门进入发动机的空气量。
The emission control system is required by law to reduce the air pollution the engine could produce.
排放控制系统按法规要求来降低发动机可能产生的空气污染。
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