throttle expansion valve

例句：

1. 1.The throttle expansion valve is responsible for controlling the flow of air in the engine.
   节流膨胀阀负责控制发动机中空气的流动。
2. 2. The throttle expansion valve is a critical component of the fuel injection system.
   节流膨胀阀是燃油喷射系统的关键部件。
3. 3.The throttle expansion valve is designed to maintain a constant air-fuel ratio in the engine.
   节流膨胀阀设计用来保持发动机中的空气燃料比恒定。