adj.强迫的;义务的;规定的;
例句:
English, Maths, ICT and science are compulsory subjects.
英语、数学、信息与通信技术和科学是必修科目。
They have campaigned strongly for compulsory registration of dogs.
他们强烈呼吁实行犬类强制登记。
a compulsory purchase order
强制征购令