阶梯

例句：

1. 1. She climbed the stairs to reach the top floor.
   她爬楼梯到达顶楼。
2. 2.The old house has many staircases leading to different rooms.
   这座老房子有许多楼梯通向不同的房间。
3. 3. The children were climbing the stairs to play in the attic.
   孩子们正在爬楼梯去阁楼玩耍。