compulsory

强制的、强迫的、义务的

Wearing a seatbelt is compulsory for everyone in the car.

车上每个人都必须系安全带。

必修的教育

Math remains a compulsory subject throughout high school.

数学在整个高中阶段都是必修科目。

强制性的、法定的法律

The land was taken under a compulsory purchase order.

这块土地依强制征收命令被取得。

规定动作、指定项目体育，常用复数

She scored well in the compulsories but faltered in the free program.

她在规定动作拿到高分，但自由项目表现失常。