double curvature arch

• 双曲拱

double curvature arch的用法和样例：

例句

1. Marble Arch was added to commemorate British Victories at Waterloo and Trafalgar.
   大理石曲拱增加纪念英国在滑铁卢和特拉法尔加战役的胜利。
2. The upper lobe vessel can be seen through the density of the aortic arch and the left heart silhouette remains intact.
   上部耳垂船能被看见通过大动脉曲拱的密度并且左心脏剪影保留原封。