idler gear

例句：

1. 1.The idler gear is designed to reduce friction between the drive shaft and the driven shaft.
   惰轮的设计旨在减少驱动轴和从动轴之间的摩擦。
2. 2. The gearbox is responsible for transmitting power from the engine to the wheels.
   齿轮箱负责将发动机的动力传递到车轮上。
3. 3. The idler gear is a crucial component of the transmission system, ensuring smooth operation of the vehicle.
   惰轮是传动系统的关键部件，确保车辆的平稳运行。