Noun:

1. a review that refreshes your memory;

   "I need a rub up on my Latin"
   

Rubeln.鲁贝尔rubv.擦；摩擦；搓；惹恼n.困难；障碍；擦Rubus gressittiin.江西悬钩子rubbing fastness耐摩擦程度Rubus kulinganusn.牯岭悬钩子rubbing friction滑动摩擦ruber pump valve橡胶泵阀rubost stability鲁棒稳定Rubus pinfaensisn.红毛悬钩子Rubus pectinarisn.梳齿悬钩子Rubus sumatranusn.红腺悬钩子Rub down a horse把马彻底梳洗一番

1. His speech whipped up national feelings.
   他的演讲唤起了民族感情。
2. The picture calls up memories of my school days.
   这张照片唤起了我学生时代的回忆。
3. He wants to brush up his knowledge of electronics.
   他想温习他的电子学知识。
4. Mr. Jones wanted to Brush up onhis computer skills.
   琼斯先生想要温习他的计算机技术。