power-factor indicator

例句：

1. 1. The power factor of the generator is an important parameter to monitor during operation.
   发电机的功率因数是运行过程中需要监测的重要参数。
2. 2. The power factor of the motor is also critical for efficiency calculations.
   电机的功率因数对于效率计算也至关重要。
3. 3. In this study, we used a power factor indicator to measure the energy consumption of different devices.
   在这项研究中，我们使用了一个功率因数指标来测量不同设备的能量消耗。