commutative

commutative
[kəˈmjuːtətɪv, ˈkɒmjʊˌtətɪv]
adjective
  1. (Mathematics)involving the condition that a group of quantities connected by operators gives the same result whatever the order of the quantities involved, e. g. a × b = b × a
    (数)交换的(如a × b = b × a)
    ■(rare)(generally) relating to or involving substitution or exchange
    (罕)(一般)代替的;交换的
语源
  1. mid 16th cent. (in the sense 'relating to transactions between people'): from French commutatif, -ive or medieval Latin commutativus, from commutat- 'exchanged', from the verb commutare (see commute)
英语宝典
考试词汇表