brushup

1. I must brushup my French.
   我必须重新温习法文。
2. The system can run off line or continuously for a long time, and it has the features of simple structure, high brushup, low cost, etc.
   该系统能脱机和连续长期运行，具有结构简单、显示刷新速度快、成本低等特点。

noun

1. practice intended to polish performance or refresh the memory

   Synonym:    review