Nancy began to climb the stairs.

南希开始爬楼梯。

We walked up a flight of stairs.

我们上了一段楼梯。

He learned to walk safely up and down stairs.

他学会了安全地上下楼梯。

He stopped at the top of the stairs.

他在楼梯顶端停了下来。

...a stair carpet.

楼梯地毯

I followed her down the stair.

我跟着她下了楼梯。

Terry was sitting on the bottom stair.

特里正坐在最下面的一级楼梯上。