Usage priority
Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
必须的；规定的；义务的
先理解核心含义，再看它在真实句子里的用法。
必须的；规定的；义务的
Required by law, rule, or obligation; mandatory.
Attendance at the meeting is compulsory for all staff.
所有员工都必须参加会议。
必须的；义务的；强制的
Required; obligatory; mandatory.
规定必须的
required by rule
具有强制力的；约束的
Having the power of compulsion; constraining.
English is a compulsory subject at this school.
在这所学校，英语是一门必修科目。
AI contextual example
The new rule makes wearing a mask compulsory in the office.
新规定使在办公室佩戴口罩成为强制要求。
AI contextual example
in most schools physical education is compulsory
在大多数学校,体育是必修课
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
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Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.