staircase 的英语意思
staircasestaircase /ˈsteəkeɪs $ ˈster-/ noun [countable] 
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a set of stairs inside a building with its supports and the side parts that you hold on to（建筑物内的）楼梯，包括支撑结构和两侧扶手
查看全部语言翻译 a set of stairs inside a building with its supports and the side parts that you hold on to（建筑物内的）楼梯，包括支撑结构和两侧扶手