electromotive power

例句：

1. 1. The electric motor is the heart of an electric generator.
   电动机是发电机的核心。
2. 2. Electricity is a form of energy that can be used to power various devices.
   电能是一种可以用来为各种设备提供动力的能量形式。
3. 3. The efficiency of an electric motor depends on its electromotive power.
   电动机的效率取决于其电动力。