ace in the hole

名词 n.
中文释义

英文释义

名词 n.
  1. Synonym of ace up one's sleeve. US,idiomatic,informal
    — Our ace in the hole left our opponents stupefied; it isn't every day that an NBA star plays street basketball.

词形变化

aces in the hole plural

词源

From stud poker in which there is one unknown card called the hole card, referring to the optimum hole card being an ace.
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