compulsory
UK [kəm'pʌl.sər.i] US [-sɚ-] adjective
ADVANCED
■If something is compulsory, you must do it because of a rule or law 必须做的；强制性的；必修的•Swimming was compulsory at my school.在我们学校，游泳是必修课。 •Wearing seat belts in cars is compulsory by law.坐车系安全带是法律强制规定的。 |