arch viaduct

例句：

1. 1. The arch viaduct is a marvel of engineering.
   这座拱形高架桥是工程学的奇迹。
2. 2.The arch viaduct connects two cities, providing easy access to the countryside.
   这座拱形高架桥连接了两个城市，为乡村提供了便捷的通道。
3. 3.The arch viaduct was built during the Roman Empire, when transportation was essential for trade.
   这座拱形高架桥是在罗马时期建造的，当时交通对于贸易至关重要。