tunnel maintenance

例句：

1. 1. The tunnelmaintenance crew is responsible for keeping the tunnels in good condition.
   隧道维护团队负责保持隧道的良好状态。
2. 2. The tunnel maintenance crewhas been working tirelessly to ensure thesafety of all travelers.
   隧道维护团队一直在努力工作，以确保所有旅行者的安全。
3. 3.The tunnel maintenance crew is responsible for fixingany damage caused by natural disasters.
   隧道维护团队负责修复任何由自然灾害造成的损害。