副轴

例句：

1. 1. Themachine has an auxiliary shaftthat can be used to adjust the speed.
   这台机器有一个可以调整速度的辅助轴。
2. 2. The auxiliary shaftis responsible for transmitting power from themain shaft to the wheels.
   辅助轴负责将动力从主轴传递到车轮。
3. 3. Theauxiliary shaft is a crucialcomponent in the operation of the machine.
   辅助轴是机器操作中至关重要的部件。