commutation
/ˌkɒmjuːˈteɪʃən/noun
mass noun
1
- the action or process of commuting a judicial sentence减刑。
1.1
- 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。
词源
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.