change gear box

例句：

1. 1.The car needs to change its gear box for better performance.
   这辆车需要更换变速器以获得更好的性能。
2. 2.The mechanic changed the gear box on my car.
   机械师更换了我的车的变速器。
3. 3.The driver had to change his gear box when the road was slippery.
   当道路湿滑时，司机不得不更换他的变速器。