1
- 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：
he commuted from Corby to Kentish Town.
他经常往返于科比和肯蒂什镇之间。
2
- with obj. reduce (a judicial sentence, especially a sentence of death) to another less severe one减（刑, 尤指死刑）：
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。
2.1
commute something for/into
change one kind of payment or obligation for (another)兑换; 改变; 折偿, 代偿：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。
2.2
- replace (an annuity or other series of payments) with a single payment折合偿付, 折算：
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。
3
- no obj. Mathematics (of two operations or quantities) have a commutative relation【数】（两个运算, 两个量）可交换：
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。
派生词
commuter
noun （限义项1）词源
late Middle English （in the sense 'interchange (two things)'）： from Latin commutare, from com- 'altogether' + mutare 'to change'. Sense 1 originally meant to buy and use a commutation ticket, the US term for a season ticket (because the daily fare is commuted to a single payment).