When he looked at the paintings up close, he saw brush strokes, texture and fields of color.

VOA: special.2010.03.24

I got the feeling, when I was talking to some of you guys, that maybe you should brush up on your calculus.

当我和你们中某些人聊天时,我感觉到,你们应该好好复习微积分

耶鲁公开课 - 基础物理课程节选

OCW Self learners are coming to OCW to explore whole new areas of study as well as to brush up on subjects that they took a while ago and perhaps got the rest in the end.

自学者浏览,搜索全新领域的研究,补充学过的科目的知识,使之完整。

麻省理工公开课 - 媒体、教育、市场课程节选

The tiny silicon wires stick up from the base,or substrate, looking something like a microscopic hair brush.

VOA: standard.2010.02.19