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n.楼梯；（楼梯的）一级； 变形： 复数：stairs 双语释义：n.(名词)[P] 楼梯 stairs; series of fixed steps from one floor of a building to another, usually inside[C] 梯级 any of the steps in a set of stairs英英释义： stair[ stεə ]n.support consisting of a place to rest the foot while ascendin
