1·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。
—— 《牛津词典》
2·They have campaigned strongly for compulsory registration of dogs.
他们大力开展了狗的强制性登记活动。
—— 《柯林斯英汉双解大词典》
3·He believes that the study of history should be compulsory in school.
他认为在学校里学习历史应该是强制性的。
—— 《柯林斯英汉双解大词典》
4·It was settled by compulsory arbitration.
此事已通过强制性仲裁得到解决。
—— 《新英汉大辞典》
5·There are no compulsory standardized tests in Finland, apart from one exam at the end of students' senior year in high school.
除了在学生高中最后一年的那一次考试，芬兰没有其它强制性的标准化考试。