您要查找的是不是：
- The keystone in the crown of an arch. 拱顶石位于拱顶的塞缝石
- To furnish(an arch) with a keystone. 用拱顶石装饰（拱顶）
- To furnish(an arch)with a keystone. 用拱顶石装饰(拱顶)
- The arch has a span of 60 metres. 那个拱的跨度为60米。
- The boy walks through the undecorated arch. 那男孩走过未经装饰的拱门。
- They considered him their arch opponent. 他们将他看成是主要对手。
- Marble Arch is a famous London landmark. 大理石拱门是著名的伦敦标志。
- Go through the arch and follow the path. 穿过拱门，沿著那条路走。
- A wooden frame built especially to support the sides of an arch until the keystone is positioned. 支拱板条专门用来在拱顶石放置好以前支撑拱的两边木架子
- Have you been to the Triumphal Arch? 你去过凯旋门吗？
- arch keystone 拱冠石
- An arch over an entrance or passageway. 拱门，牌楼入口或通道上的拱顶
- Belief in a life after death is the keystone of her religious faith. 她的宗教信仰的基础是相信死后有来生。
- The arch of short hairs covering this ridge. 眉毛覆盖于眉上的拱状短毛
- A pointed arch,usually has a joint (instead of a keystone) at the apex. 一种尖角拱,在顶点通常有一个接合点（而不是拱心石）。
- The keystone to any marriage is one word: “WE”. 任何婚姻的基石只有两个字:“我们”。
- A pillar, rectangular in cross section, supporting an arch or roof. 支柱交叉处的长方形柱子，支撑一个拱顶或屋顶
- The second part is the keystone of this article. 这是论文的重点论述部分。
- The trees overhung the brook forming an arch of branches. 那些树伸向小溪上，形成一道树枝的拱门。
- The keystone to any marriage is one word: "WE". 任何婚姻的基石只有两个字:“我们”。
