maintenance time

例句：

1. 1. The car needs regularmaintenance to keep it running smoothly.
   这辆车需要定期维护，以保持其顺畅运行。
2. 2. The project will take several months ofmaintenance time before completion.
   这个项目将在完成前需要几个月的维护时间。
3. 3. Duringthe maintenance time, thetechnicians were busy fixing thecar's engine.
   在维护时间期间，技术人员忙于修理汽车的引擎。