commutation

commutation
noun
[mass noun]
  1. the action or process of commuting a judicial sentence
    减刑
    ■the conversion of a legal obligation or entitlement into another form, e. g. the replacement of an annuity or series of payments by a single payment
    折合偿付;代偿
  2. the process of commutating an electric current
    换向;整流
  3. (Mathematics)the property of having a commutative relation
    (数)交换
语源
  1. late Middle English (in the sense 'exchange, barter', later 'alteration'): from Latin commutatio(n-), from commutare 'exchange, interchange' (see commute). Sense 1 dates from the late 16th cent
英语宝典
考试词汇表