短语词组短语brush h up on 温习;复习brush h up on sth 复习Brush up on technology 在技术方面充电brush up on sth 复习;重新学习;重新温习;温习brush up on knowledge 充电brush up on review 复习;温习brush up on something 复习brush up on detail 温习复习 返回 brush up on