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新东方-柯林斯雅思备考词典
stair
英 [steə]
[NOUN]
stairs
1. [PL 复数] （建筑物内楼层之间的）楼梯
Stairs are a set of steps inside a building which go from one floor to another.
双语例句
例：Nancy began to climb the stairs.
南希开始爬楼梯。
例：We walked up a flight of stairs.
我们往上走了一段楼梯。