穹顶

穹顶
qióngdǐng
(1) [dome]∶悬垂的半球体空间或面积
(2) [crown; vault]∶穹或穹形面(如朝中央圆拱的一条街或桥面)的顶点或顶部; 特指圆拱的道路的中央和其边缘间高度的区别

Advanced Chinese dictionary. 2013.

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