| 单词 | brush up | 
| 释义 | brush up    or brush up on         phrasal verb B2    See full dictionary entry for  brush If you brush up something or brush up on it, you practise it or improve your knowledge of it.   I had hoped to brush up my Spanish. [VERB PARTICLE noun]     Eleanor spent much of the summer brushing up on her driving. [VERB PARTICLE PARTICLE noun]     | 
	
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