card shark

例句：

1. 1. The card sharks were always trying to outsmart the other players.
   那些卡片鲨鱼总是试图胜过其他玩家。
2. 2. The card shark was caught by the police for illegal gambling activities.
   那个卡片鲨鱼因为非法赌博活动被警方抓获。
3. 3.He's a card shark, always looking for ways to win at any game he plays.
   他是个卡片鲨鱼，总是寻找任何游戏获胜的方式。