| 单词 | past master | 
| 释义 | past master Word forms:  past masters   countable noun  If you are a  past master at something, you are very skilful at it because you have had a lot of experience doing it.   He was a past master at manipulating the media for his own ends. [+ at]     She is an adept rock-climber and a past master of the assault course. [+ of]    Synonyms:  expert,  ace [informal], wizard, artist      | 
	
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