throttling coefficient

例句：

1. 1.The throttling coefficient of the engine is a critical factor in determining its performance.
   发动机的节流系数是决定其性能的关键因素。
2. 2. The engineer adjusted the throttling coefficient to optimize the fuel efficiency.
   工程师调整了节流系数以优化燃油效率。
3. 3.The throttling coefficient is used to calculate the pressure drop across the valve during operation.
   节流系数用于计算阀门操作过程中的压力损失。