名词中文翻译
中文翻译：保留类
同义词：
['retention group', 'retention cohort', 'retention class']
例句：
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1. The students in the retention class are expected to perform better than those in other classes.
留级班的学生预期会比其他班级表现更好。
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2. The retention class is responsible for monitoring and evaluating the progress of students.
留级班负责监督和评估学生的进步。
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3. The retention class was formed to provide additional support to struggling students.
留级班成立是为了给学习有困难的学生提供额外的支持。