使出绝招

• play one's best card

例句

1. 将军决定使出绝招，派坦克参加战斗。
   The general decided to play his ace and send in the tanks.
2. 这局牌已对他不利，所以他决定使出绝招来击败对手。
   The card game had been going badly for him, so he decided to bring out his big guns.