英 [rʌb ʌp] 美 [rʌb ʌp]
复习，温习：重新回顾或刷新对知识的了解。
提高，增强：增强（某种心智能力）的敏锐度。
rub up //
动词 to refresh one's memory (of) 重温
a review that refreshes your memory
... rub inv.用力擦入;反复讲 rub upvt.擦亮;揉和;激起 rub on勉强度过 ...
... rub inv.用力擦入;反复讲 rub upvt.擦亮;揉和;激起 rub on勉强度过 ...
He asked me to rub up the silver.
他让我把银器擦一擦。
I must rub up my French.
我得复习我的法语。
I am going to rub up the chromium on the car.
我准备把汽车上的镀铬部件擦亮。
As China continues to rub up uneasily against its maritime neighbors, including Japan, which occupies another set of disputed islands, these seas could get stormier.
FORBES: Port In A Storm: An Interview With China Merchants Group
They act as giant petri dishes, where creative types and entrepreneurs rub up against each other, combining and recombining to spark new ideas, new inventions, new businesses and new industries.
Both for what it says about changing attitudes towards aid in Africa, as well as the more familiar chaffing that occurs when pride, philanthropy, poverty and celebrity rub up against each other.