Past master
01
老手, 经验丰富的专家
an expert in a particular field with a great deal of experience
Idiom
Informal
例子
John is a past master at chess, and he rarely loses a game.
约翰是国际象棋的过去大师，他很少输掉比赛。
As a past master of diplomacy, she skillfully negotiated the international treaty.
作为外交领域的老手，她巧妙地谈判了国际条约。
02
前大师, 荣誉大师
someone who was formerly a master
