单语范例（未经PONS编辑处理）
The fort includes more than two kilometers of underground passages added between 1852 and 1860, with ceilings six meters thick.
en.wikipedia.org All three floor ceilings are covered in hollow concrete slabs.
en.wikipedia.org The vertical model was 20 inches and multiples of this would delineate everything upright, for example, from window ledges, to window and ceiling heights.
en.wikipedia.org The caldarium had vaulted ceilings, raised floors, and channels in the walls to conduct heat.
en.wikipedia.org The second floor has large windows and vaulted ceilings, restrooms, and a lunchroom.
en.wikipedia.org