maintenance and overhaul

例句：

1. 1. The carneeds regular maintenance and overhaul tokeep it running smoothly.
   这辆车需要定期维护和检修，以保持其顺畅运行。
2. 2. The factory has been undergoing amajor overhaul to improve efficiency.
   工厂正在进行一次重大的检修，以提高效率。
3. 3. The engineerswill conduct a comprehensive maintenance andoverhaul of the equipment beforethe next shift.
   工程师们将在下一班次开始前对设备进行全面的维护和检修。