形容词
中文翻译：强制的
同义词：
['obligatory', 'compulsory', 'mandatory', 'requisite']
例句：
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1. The law is compulsory for all citizens to follow.
法律对所有公民都是强制性的。
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2. The teacher made the class a compulsory activity.
老师让全班同学都参加了这次活动。
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3. The student was required to attend the meeting.
学生被要求参加会议。