noun 下载 🔗分享 拱石,拱形砖。 One of a series of wedge-shaped bricks or stones forming an arch or vault. Examples : "The ancient Roman bridge was built with carefully shaped voussoirs that interlocked to form its strong, curved arches. " 这座古罗马桥梁是用精心塑形的拱石 (gǒngshí) 建造的,这些拱石互相交错,形成了坚固弯曲的拱形结构。 architecture building material 与AI对话词汇游戏阅读练习