brake ring

例句：

1. 1.The brake ring was worn out, and the car wouldn't start.
   刹车环磨损了，汽车发动不了。
2. 2. The mechanic replaced the brake ring with a new one.
   技师用一个新的刹车环替换了旧的。
3. 3. The brake ring is essential for maintaining smooth braking performance.
   刹车环对于保持平稳的制动性能至关重要。