阶梯教室

例句：

1. 1.The staircase leads to the second floor.
   楼梯通向二楼。
2. 2. She climbed the stairs to reach the top of the building.
   她爬上楼梯到达大楼的顶部。
3. 3. The staircase was narrow and winding.
   楼梯狭窄且曲折。