[, ] () the right to exchange a series of future payments for one large sum that you receive now折现（放弃将来得到逐步偿付的权利而立刻得到一大笔现金的行为）◆The scheme provides for full commutation of pension benefits.方案规定退休金全部折现。 () the act of travelling regularly by bus, train, car, etc. between your place of work and your home上下班交通◆Commutation times for city residents have lengthened considerably over the last ten years.在过去的十年里，城市居民的上下班时间已大大延长。