electric shaft

例句：

1. 1. The electric motoris the heart of the machine.
   电动机是机器的核心。
2. 2. The electric shaft drives the gears to turn the machine.
   电动轴驱动齿轮使机器转动。
3. 3. The electric shaft isessential for the smooth operation of the machine.
   电动轴对于机器的平稳运行至关重要。