-
1.The engineer designed the cover arch of the tunnel to provide structural support for the roadway.
工程师设计了隧道的覆盖拱，为道路提供结构支撑。
-
2. The construction of the tunnel was completed in record time, thanks to the efficient design of the cover arch.
由于覆盖拱设计的高效，隧道的建设在预定时间内完成。
-
3. The cover arch of the tunnel is essential for maintaining the integrity of the roadway and preventing water infiltration.
隧道的覆盖拱对于保持道路完整性和防止水分渗透至关重要。