throtted steam

例句：

1. 1.The engine was throttled to maintaina steady speed.
   发动机被节流以保持恒定的速度。
2. 2. The car's exhaust pipeis throttled to reduce pollution.
   汽车的排气管被节流以减少污染。
3. 3.The scientist used a throttled valveto control the flow of gases.
   科学家使用一个节流阀来控制气体的流量。