noun🔗Share双元素集合, 二元组 A set containing precisely two elements."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。mathnumberelementChat with AIVocabulary GamePractice Reading
noun🔗Share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"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。gameChat with AIVocabulary GamePractice Reading
