王牌在英语中通常称为 "ace"，来源于拉丁文 "as"，意为 "一"，表示王牌是一副牌中点数最大的牌。例句如下：

He played his ace and won the game. 他出了王牌赢得了比赛。

She's the ace of the marketing team. 她是营销团队的王牌。

He's got an ace up his sleeve. 他有杀手锏。