He brushedupon fractions before taking the arithmetic test.
在参加算术考试前他又重温了分数。
2
Since then most have brushedupon risk management and cut back on their equity holdings.
自此之后，保险公司大都重新重视风险管理以及降低了持股票的比例。
3
It seems hard to believe that you woke up, brushed your teeth and are reading this article because of something happening on the boundary of the universe.