All passengers must wear seat belts.

所有乘客都要系安全带。

Traffic rules require drivers to wear seat belts.

交通规定要求司机系好安全带。

The law mandates that all drivers wear seat belts.

法律命令所有司机系安全带。

The law acts as a compulsion for people to wear seat belts.

法律作为一种强迫，让人们系上安全带。

I think it ' s good thing that all motorists should wear seat belts.

我认为司机们系上座带是件好事.