节气阀

例句：

1. 1. The radiator controls the temperature of the engine by adjusting the flow of air through the throttlevalves.
   散热器通过调整节流阀的流量来控制发动机的温度。
2. 2. The engineer used a special tool to replace the worn out throttle valves in the car.
   工程师使用特殊的工具来更换汽车中磨损的节气阀。
3. 3. The new model has a more efficient throttle valve system that can save fuel and reduce emissions.
   新款模型拥有更高效的节气阀系统，可以节省燃料并减少排放。