名词
中文翻译：等级限制
同义词：
['grade restriction', 'grade ceiling']
例句：
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1. The student must adhere to the grade limit of 90% attendance.
学生必须遵守90%出勤率的年级限制。
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2. The exam results were grade-limited to the top 5 students.
考试成绩被限制在前5名的学生。
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3. The teacher set a grade limit for the final project, requiring all students to complete it before graduation.
老师为最终项目设定了年级限制，要求所有学生在毕业前完成它。