名词
中文翻译：封闭楼梯
同义词：
['closed staircase', 'closed stairs']
例句：
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1.The old building had a closed staircase that was difficult to navigate.
这座老建筑有一个难以通行的封闭楼梯。
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2.The children were climbing up the closed stairs to reach the top of the tower.
孩子们正在爬上封闭的楼梯，想要到达塔顶。
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3. The museum had a closed staircase leading to an underground exhibition hall.
博物馆有一个封闭的楼梯，通往一个地下展览厅。