The division of students into different classes according to their grades might cause some problems, such as hurting the pride of some students whose grades are not so good.
根据成绩将学生分成不同的班级可能会导致一些问题出现，如伤害一些成绩不太好的学生的自尊。
According to the plan, teachers should not allow their classes to run too late or too early.
根据该计划，教师不应该太早上课或太晚下课。
Stereotype classes according to their patterns.
根据模式套用类。
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