rising of arch

例句：

1. 1. The arch of the bridge is a marvel of engineering.
   这座桥的拱形结构是工程学的奇迹。
2. 2. The ancient city was built on an arched bridge.
   这个古老的城市建在一座拱形桥上。
3. 3. The arches were used to hold up the roof of the temple.
   这些拱形结构用来支撑寺庙的屋顶。