double curvature arch的用法和樣例：
例句
- Marble Arch was added to commemorate British Victories at Waterloo and Trafalgar.
大理石曲拱增加紀念英國在滑鐵盧和特拉法爾加戰役的勝利。 - The upper lobe vessel can be seen through the density of the aortic arch and the left heart silhouette remains intact.
上部耳垂船能被看見(jiàn)通過(guò)大動(dòng)脈曲拱的密度并且左心臟剪影保留原封。
