词典释义：
[no obj.]travel some distance between one's home and place of work on a regular basis
通勤；经常在家和工作地点之间往返
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he commuted from Corby to Kentish Town .他经常往返于科比和肯蒂什镇之间。
[with obj.]reduce (a judicial sentence, especially a sentence of death) to another less severe one
减（刑，尤指死刑）
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the head of state commuted the sentence to fifteen years' imprisonment .国家元首将判决减轻为１５年有期徒刑。
(
兑换；改变；折偿，代偿
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tithes were commuted into an annual sum varying with the price of corn .农产品什一税由一笔随谷物价格变化的年度总金额数代偿。
replace (an annuity or other series of payments) with a single payment
折合偿付，折算
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if he had commuted some of his pension he would have received ￡330,000 .如果折合偿付他的部分养老金的话，他将得到３３０，０００英镑。
[no obj.]
【数】 （两个运算，两个量）可交换
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operators which do not commute with each other .不能相互交换的算符。
a regular journey of some distance to and from one's place of work
通勤；上下班交通路程。
"late Middle English （in the sense ‘interchange （two things）’）： from Latin
