calmbelt

例句：

1. 1. The driverwas instructed to fasten his safety beltbefore starting the engine.
   司机被指示在启动引擎前系好安全带。
2. 2. Duringthe flight, passengers are required to fasten their seat belts.
   飞行期间，乘客需要系好安全带。
3. 3. The car's airbag system is designed toprotect passengers in the event of a collision.
   汽车的气囊系统设计用来在碰撞事件中保护乘客。