alternating tread staircase

Party B/Renter/Tenant is allowed to use building staircases and the south entrance elevator for their access to their leasing area.

七、乙方可以使用大楼步行楼梯，南门电梯作为进出租赁范围的通道。

Hangzhou Yingbu Stair Co., Ltd.

杭州盈步楼梯有限公司

Dixon flung himself up the staircase.

狄克逊飞步奔上楼梯。

Clutch stair armrest, move carefully step by step.

抓紧楼梯扶手，一步步谨慎地移动。

A step in a straight stairway.

（平行）梯级一段直楼梯中的一级

A vertical support at the center of a circular staircase.

螺旋楼梯中柱环行楼梯中间的垂直支撑

Designing and exploring An Electric Stair Climbing Vehicle Can Go Both On the Stairs and Road;

上楼、行路两用电动楼梯车的设计探索

the sound of feet pounding on the stairs

楼梯上响起的沉重脚步声

He climbed the eight flights to Connie's apartment, going fast.

他爬了八段楼梯，快步走到了康妮的家。

Then came a little pattering of feet on the stairs.

接着传来楼梯上细碎的脚步声。

At this moment his footsteps sounded on the stairs.

这时候传来了他走在楼梯上的脚步声。

I heard a clump on the stairs.

我听到楼梯上有笨重的脚步声。

I could hear feet pounding on the stairs.

我听到楼梯上的沉重脚步声。

I heard his heavy tread up the stairs.

我听到他那沉重的脚步走上楼梯。

One of the steps of a winding staircase.

斜踏步转弯的楼道处的一个梯阶

I can not believe I am out of breath just from climbing these stairs .

爬这么几步楼梯就喘不过气来，真是的。

heard stealthy footsteps on the stairs.

听见楼梯上悄悄的脚步声。

an incautious step sent her headlong down the stairs.

一步不小心她就头朝前摔下了楼梯。