柯林斯詞典commutative /k??mju?t?t?v, ?k?mj??te?t?v/ 1. ADJ relating to or involving substitution 交換的; 代替的 返回 commutative劍橋詞典(of a calculation ) giving the same result whatever order the values are in 可交換的(計算) 返回 commutative