working life
noun uk/ˌwɜː.kɪŋ ˈlaɪf/ us/ˌwɝː.kɪŋ ˈlaɪf/
(PERSON)
[ C ]（一生的）工作时间，工作生涯
the part of a person's life when they do a job or are at work
His entire working life was spent with the same firm. 他一生都在为同一家公司工作。
(MACHINE)
[ C usually singular ]（一台机器的）工作寿命;工作年限
the complete amount of time for which a machine can be expected to operate
The working life of most vehicles can be increased if they are serviced regularly. 如果定期保养，大部分车辆的工作寿命都能延长。