repeater

The teacher noticed that Tim was a fast learner and quick to catch on, but Sarah was more of a slow repeater, needing extra practice to fully understand the material.

老师注意到蒂姆是一个学得很快、领悟力强的学生，但莎拉更像是一个学得慢的复读生，需要额外的练习才能完全理解材料。