(about training, courses of study, etc.) done while sb is working in a job, in order to learn new skills （培训、课程等）在职的，在职期间进行的，不脱产的◆in-service training 在职培训
used to describe sb who is working or sth that is being used for a particular purpose 现职的；正在使用的（东西）◆pre-service and in-service teachers 前任和现职教师◆The ship has a scheduled in-service date of 2011. 这条轮船 2011 年有一个预定的开始服役日期。