stairsteps

用于上下楼层。
常用释义
n.楼梯台阶:楼梯的一级或多级台阶,用于上下楼层。

例句

1·Hearing that news, his mother suddenly fell down from the stairsteps.

听到那个消息,他的妈妈突然从楼梯上摔下来。