Each building had fireproof drywalls to protect the stairwells.

每座大楼都有防火干板墙保护其楼梯井。

Floor evacuations should be made by the stairwells.

应通过楼梯井进行楼层疏散。

The exits, routes, stairwells are not totally blocked.

安全出口，疏散通道，和楼梯不能完全被堵塞。

At the office, they slink into hallways, bathrooms, and stairwells.

在写字楼里，他们灰溜溜躲进过道、洗手间、楼梯井。