He used card-counting in blackjack to significantly improve his winning chances.

card-counting 是由名词 card（牌）和动词 count（计算）加上连字符组成的复合词，-ing 表示动作正在进行或持续的状态。 card-counting 指在扑克游戏中通过记忆和计算已出现的牌来预测剩余牌的概率分布，是一种提高胜率的技巧，中文常译为"算牌"。