ratchet adjustment clutch

例句：

1. 1. The engineer adjusted the speed of the car to match the road conditions.
   工程师调整了汽车的速度以适应道路条件。
2. 2.The pilot used the throttle to control the plane's altitude.
   飞行员使用油门控制飞机的高度。
3. 3. The car's gearbox was a ratchet adjustment clutch that made shifting gears easy.
   这辆车的变速器是一个调节装置，使得换挡变得容易。