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Ceiling
01
天花板, 顶棚
the highest part of a room, vehicle, etc. that covers it from the inside
Example
He stood on a ladder to change a lightbulb on the ceiling.
He installed soundproofing material on the ceiling to reduce noise from the floor above.
He noticed a water stain on the ceiling and called a professional to fix the leak.
02
云底高度, 云层高度
(meteorology) altitude of the lowest layer of clouds
03
上限, 限制
an upper limit on what is allowed
04
飞行高度上限, 最高飞行高度
maximum altitude at which a plane can fly (under specified conditions)
