switch gear room

例句：

1. 1. The car had a small switch gear room in the front.
   这辆车的前部有一个小型的换挡室。
2. 2.The mechanic was working on the car's switch gear room.
   机械师正在修理汽车的换挡室。
3. 3.The engineer had to switch gear room to make the engine run smoothly.
   工程师不得不切换换挡室，让发动机运行顺畅。