机动煞车

例句：

1. 1. The car has a built-in emergency brake system to prevent accidents.
   这辆车有内置的紧急制动系统，以防止事故。
2. 2. The driver quickly applied the emergency brakes to avoid hitting a pedestrian.
   司机迅速踩下紧急制动以避免撞到行人。
3. 3. The train had a mechanical brake that could be activated by pulling a lever on the side of the train.
   火车有一个机械制动器，可以通过拉动火车侧面的杠杆来激活。