[, ]the part of a person's life that they spend working职业生涯◆He spent his whole working life in publishing.他一生都从事出版业。the total amount of time that a machine, a factory, etc., operates（机器、工厂等的）工作年限，使用寿命◆These parts will need to be replaced several times during the machine's working life.这些零部件在机器的工作年限内需要更换几次。