Ⅰ形容词 1.(两个) two; twin; both; dual 短语和例子 双发动机飞机 twin-engined plane; 双向交通 two-way traffic; 成对成双 in pairs2.(偶数的) even 短语和例子 双号座位 even-numbered seats; 双数 even numbers3.(加倍的) double; twofold 短语和例子 双份 double the amount; twice as muchⅡ量词 (用于成对的东西) pair 短语和例子 一双筷子 a pair of chopsticks; 一双鞋 a pair of shoesⅢ名词 (姓氏) a surname 短语和例子 双福 shuang fu