brake chain

例句：

1. 1.The brake chain is the most important part of the car's braking system.
   刹车链是汽车制动系统最重要的部分。
2. 2.The brake chain was worn out, and the car couldn't stop.
   刹车链磨损了，车无法停下。
3. 3.The mechanic checked the brake chain and found a small crack in it.
   机械师检查刹车链，发现它有一道小裂缝。