that must be done because of a law or a rule（因法律或规则而）必须做的，强制的，强迫的 synonym mandatory- English is a compulsory subject at this level.英语在这一级别是必修科目。🔊🔊
- compulsory education/schooling义务教育
- The strikers are protesting against the threat of compulsory redundancies.罢工者抗议强制裁员的威胁。
- There is no compulsory education in this part of Africa.非洲的这一部分没有义务教育。
- it is compulsory (for somebody/something) to do something It is compulsory for all motorcyclists to wear helmets.所有骑摩托车的人都必须戴头盔，这是强制性的。🔊🔊
opposite voluntaryTopics Permission and obligationb2, Educationb2Oxford Collocations DictionaryCompulsory is used with these nouns: - attendance
- conscription
- education
- …
See full entry Word Originearly 16th cent. (as a noun denoting a legal mandate which had to be obeyed): from medieval Latin compulsorius, from compuls- ‘driven, forced’, from the verb compellere, from com- ‘together’ + pellere ‘drive’.