[N-COUNT 可数名词](建筑物内的)楼梯 A staircase is a set of stairs inside a building.
They walked down the staircase together.
他们一起下了楼梯。
Oxford
stair·case/ˈsteəkeɪs; NAmEˈsterkeɪs/noun _staircase.jpg _staircase.jpg a set of stairs inside a building including the posts and rails (= banisters) that are fixed at the side (建筑物内的)楼梯◆a marble/stone/wooden staircase大理石╱石╱木楼梯☞see also