发布于:2025-07-06 05:41浏览量:75文/优校网
1.【建】拱腹;楼梯(或柱上楣等的)下部
2.【戏】上部布景,天空布景
1.the underside of a structural component of a building, e.g. the underside of a roof overhang or the inner curve of an arch