primary brake shoe

例句：

1. 1. The primary brake shoe is the first part of the brake system that engages with the vehicle's wheels to slow them down.
   主制动蹄片是制动系统中与车辆车轮接触的第一部分，用于减速。
2. 2. The primary brake shoe needs to be replaced every 50,000 miles or when itstarts to wear out.
   主制动蹄片每行驶50,000英里就需要更换一次，或者当它开始磨损时。
3. 3. The primary brake shoe is responsible for stopping the car when you press the brake pedal.
   主制动蹄片负责在踩下刹车踏板时阻止汽车停止。