名词中文翻译
中文翻译：年龄等级
同义词：
['grade', 'grade level', 'age group']
例句：
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1.The school has a system of age-graded classes for students of different ages.
学校为不同年龄段的学生设有分级班级。
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2.She is currently in the third grade and enjoys reading books at her age-grade level.
她目前就读三年级，并且喜欢在适合自己年龄的阅读水平上阅读书籍。
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3. The teacher explained the concept of age-grades to the students during the lesson.
老师在课上向学生们解释了年龄等级的概念。