n.交换， 折算， 折合，减刑...

n.反互换...

a commutation of the death sentence to life imprisonment由死刑减为终身监禁The prisoner obtained a commutation of his sentence from death to life imprisonment.这个囚犯得到减刑,由死刑改判无期徒刑.Commutation is distinct from reprieve.减刑不同于缓刑....

commutation的音标：commutation的英式发音音标为：[ˌkɒmju'teɪʃn]commutation的美式发音音标为：[ˌkɑmju'teɪʃn]...

decommutation的音标：decommutation的英式发音音标为：[di:kɒmjʊ'teɪʃən]decommutation的美式发音音标为：[dikɒmjʊ'teɪʃən]...