n. 交换, (电话)交换局, 交换机, 汇兑, 交易所
v. 交换, 交易, 兑换
[计] 交换; 电话局
英文释义
n. chemical process in which one atom or ion or group changes places with another
n. a mutual expression of views (especially an unpleasant one)
n. the act of changing one thing for another thing
n. the act of giving something in return for something received