•The minister is calling for mandatory prison sentences for people who assault police officers.部长呼吁把袭警者须受的惩罚定为强制监禁。

•Athletes must undergo a mandatory drugs test before competing in the championship.运动员在参加锦标赛前必须接受强制性药检。

•In 1991, the British government made it mandatory to wear rear seat belts in cars.1991年，英国政府强制要求汽车后座乘客佩带安全带。