汽车启动前要系好安全带。

___Fasten your ___seatbelt before starting the car.

请系好安全带，我们要出发了。

Please ___fasten your seatbelt; we're about to leave.

请系好安全带，我们马上要出发了。

Please ___fasten your seatbelt, we're about to leave.

安全带在撞击时自动扣紧了。

The seat belt ___was fastened automatically during the crash.