staircase

/ˈstɛrˌkeɪs/

a way of access (upward and downward) consisting of a set of steps

中文释义：楼梯；楼梯间

The grand staircase was made of marble and gold.

宏伟的楼梯由大理石和黄金制成。

Fire escape routes include the main staircase and emergency exits.

消防逃生路线包括主楼梯和紧急出口。