1. The more targets, the higher the ceiling. �Ը����Ŀ�꣬���ߵ����ޡ�
2. My bedroom is a large room with a high ceiling . �ҵ�������һ���컨��ܸߵĴ䡣
3. A high ceiling gives a feeling of airiness and spaciousness. �߸ߵ��컨�����һ��ͨ��Ϳ����ĸо���
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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)
