maintenancefreeadj.不需维护的maintenancen.维修；维护；保持；生活费用；抚养费maintenance fitter维修钳工maintenance system维修系统maintenance design维护设计maintenance period保养周期maintenance vector维修向量maintenance factor维护系数maintenance module维护模块maintenance domain雏护域知识maintenance outage检修停机maintenance survey养路测量

1. The crew also conducted maintenance work on the station.
   机组员也替太空站进行维修工作。
2. It astonishes me to see the repair work going so fast.
   维修工作进展得这么快，真让我吃惊。