n support consisting of a place to rest the foot while ascending or descending a stairway
n. 梯级, 楼梯, 阶梯
1. I walked up the stairs to reach my apartment.
我走上楼梯去我的公寓。
2. Be careful when you go down the stairs.
下楼梯时要小心。
3. She placed her bag on the stair while she tied her shoes.
她把包放在楼梯上，然后系鞋带。