1、补课：make up missed lessons。
2、例句：The Remarks should include specific arrangements for making up the missed class.院系意见必须写明具体补课意见。So she decided to teach me extra lessons herself, Monday through Friday.于是她决定星期一至五自己给我补课。That is, after school, but also to the backward students extra lessons.那就是放学之后还要给后进生补课。