throttle regulator

例句：

1. 1. The car's engine needs to be throttled down for the long journey ahead.
   长途旅行前，汽车的引擎需要被节流。
2. 2. The throttle regulator is responsible for controlling the flow of fuel into the engine.
   节流阀调节器负责控制燃料流入发动机的流量。
3. 3. The throttle regulator is a critical component in maintaining the proper air-to-fuel ratio inthe engine.
   节流阀调节器是维护发动机内适当空气与燃料比例的关键部件。