staircases造句

A number of staircases ascend from the cobbled streets onto the ramparts.
一段石阶从鹅卵石路上一直向上直通城墙。

We have fully functional smoke alarms on all staircases.
我们在各层楼梯都安装有完全可用的烟雾警报器。

A slender superstructure was dictated with gently sloping approaches rather than staircases.
细长的上部结构,带有微缓斜坡接坡,比布置阶梯为优.