tunnel clearance

例句：

1. 1. The tunnel clearance is crucial forthe safety of the workers.
   隧道清空对于工人的安全至关重要。
2. 2. The tunnel clearance wascompleted ahead of schedule.
   隧道清空提前完成了。
3. 3. The tunnel clearance crew worked tirelesslyto ensure the project's success.
   隧道清空团队不懈努力以确保项目的顺利进行。