change speed motor

例句：

1. 1. The car's engine has a built-in change speed motor that allows you to easily adjust the vehicle's speed.
   这辆车的引擎内置了变速马达，可以让你轻松调整车辆的速度。
2. 2. The new model of the car has a more efficient change speed motor, which reduces fuel consumption.
   这款新车的变速马达更加高效，可以降低燃油消耗。
3. 3. The change speed motor is responsible for smoothly changing the car's speed, providing a comfortable driving experience.
   变速马达负责平滑地改变汽车的速度，提供舒适的驾驶体验。