英语单词“an ace in the hole”的翻译、意思、用法、释义-英汉词典

单词	an ace in the hole
释义	an ace in the hole1.■(纸牌戏中)正面朝下的一张A牌2.■[美国俚语]秘藏的王牌，秘密王牌；备而未用的人力(或物力)，备用的应急办法(或手段)，应急法宝，秘藏的法宝，锦囊妙计；杀手锏3.■在患难中可信赖的朋友，可共患难的朋友
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