形容词
中文翻译：无等级的
同义词：
['ungraded', 'unranked']
例句：
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1.The nongraded system allows for more flexibility in scheduling classes.
无等级制度允许在安排课程时有更多的灵活性。
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2.The nongraded system is designed to reduce the workload on teachers.
无等级制度旨在减少教师的工作负担。
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3. In the nongraded system, students are evaluated based on their performance rather than grades.
在无等级制度下，学生的评价是基于他们的表现而不是成绩。