loose brake backing plate

例句：

1. 1. The car's engine is loose, and the brake backing plate needs to be replaced.
   这辆车的引擎松了，刹车衬板需要更换。
2. 2.The mechanic checked the car's brake system and found that the loose brake backing plate was causing the problem.
   机械师检查了汽车的刹车系统，发现松动的刹车衬板是造成问题的原因。
3. 3.To fix the issue, the mechanic replaced the loose brake backing plate with a new one.
   为了解决这个问题，机械师用一个新的来替换了松动的刹车衬板。