noun 下载 🔗分享 双元素集合, 二元组 A set containing precisely two elements. Examples : "My wallet contained a doubleton of bills: a five and a ten. " 我的钱包里只有两张钞票，一个五块，一个十块，正好构成一个双元素集合。 math number element 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 双张，双套，独张套。 A pair of cards of the same suit, which are the only cards of that suit in a player's hand Examples : "The student held a doubleton of hearts, a pair of ten and a queen of hearts, but needed more cards to complete the set. " 这位学生手中有红桃双张，分别是红桃十和红桃Q，这是他手中仅有的两张红桃，但他还需要更多的牌来完成牌组。 game 与AI对话词汇游戏阅读练习
