If the ceiling does not rise, the roof may fall.
如果天花板不升高，房顶就会掉下来。
His classroom with 23 children now has lights, ceiling fans and a secure roof.
他的23位学生上课的教室现在有了电灯、吊式电扇和安全的屋顶。
Ceiling: Overhead surface of a room, and the underside of a floor or roof.
天花板：从上面覆盖一个房间的表面，以及一个楼层或一个屋顶的底面。
Because of the curved roof window, the ceiling looks like a dome of sky.
因为屋顶的天窗均为自由曲线，所以从室内看整个吊顶就像宏伟的天穹。
Thee area must have constant air movement: Ceiling fans, wall fans, roof vents, etc.
核实工厂的生产区域是否有相关设施来确保经常性的空气流通：如吊扇，壁扇，楼顶通风口等。
Vault: in building construction, an arched structure forming a ceiling or roof.
拱顶：房屋建造中用拱作成的天花板或屋顶。
We have to fix the roof; water is dripping down from the ceiling.
我们必须修理屋顶，水正从天花板滴下。
We have to fix the roof; water is dripping down from the ceiling.
我们必须修理屋顶，水正从天花板滴下。
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