1. moving staircase
   自动升降梯
   

1. We heard his heavy tread on the staircase.
   我们听到了他走在楼梯上沉重的脚步声。
2. The man dived back down the staircase out of sight.
   那人跑下楼梯不见了。
3. The corridor is terminated with a staircase.
   走廊末端是楼梯。
4. This staircase leads up to the roof.
   楼梯一直通往楼顶。
5. One of the vertical supports of a handrail on a staircase.
   楼梯栏杆小柱楼梯扶手的垂直支撑之一

　1个名词解释