the vertex of an arch

• 拱顶

the vertex of an arch的用法和样例：

例句

1. The drive was arched over with thick foliage.
   这条车道的上方由茂密的绿叶拱顶覆盖着。
2. The vault of this cathedral is very high.
   这座天主教堂的拱顶非常高。