brake booster

例句：

1. 1. The car's brake booster is designed to improve the braking performance of the vehicle.
   汽车的刹车助力器旨在提高车辆的制动性能。
2. 2.The brake booster system has been upgraded to provide better control during heavy braking.
   刹车助力系统已升级，以在重刹车时提供更好的控制。
3. 3.The brake booster was replaced after a few months of use, and the car's stopping distance has significantly improved.
   刹车助力器在使用几个月后被更换，汽车的停车距离显著改善。