stair

楼梯，阶梯；梯级英释nna set of steps built for going from one level of a building to another

1 below stairs,在地下室；在楼下

2 stair railing,楼梯栏杆

3 winding stair,盘旋柱，旋梯

4 stair tread,楼梯踏板

1 We walked up four flights of stairs (= sets of stairs ) ..我们往上走了四段楼梯。