学校中教学进度较慢的班，由学习成绩较差的学生组成。与“快班”相对slow class

• 又要把她从中游班转到慢班。

  She needs to be moved again from the middle class to the slow class.

• 快班价格比慢班价格高20%左右，价格基本在6000元上下。

  The accelerated class is about 20% more expensive than the slow class, with the price basically around 6,000 yuan.