1. The more targets, the higher the ceiling. 对更多的目标，更高的上限。
2. My bedroom is a large room with a high ceiling . 我的卧室是一个天花板很高的大房间。
3. A high ceiling gives a feeling of airiness and spaciousness. 高高的天花板给人一种通风和宽敞的感觉。
英英解释
n.
1. the overhead upper surface of a room
2. (meteorology) altitude of the lowest layer of clouds
3. an upper limit on what is allowed
4. maximum altitude at which a plane can fly (under specified conditions)
