within an ace of
接近、差一点就要......
口语·表达几乎成功或险些发生
英文释义
to be extremely close to or on the verge of something
例句
I was within an ace of winning the lottery, but I missed one number.
典故来源
源自赌博术语，'ace'（幺点）在骰子或纸牌中代表最小点数，'within an ace of' 原指差一点就掷出幺点，后引申为‘差一点就要……’。