他走上脏兮兮的楼梯，打开那扇旧门，马上开始了工作。
He walked up the dirty stairs, opened the old door, and got right to work.
楼梯使用了钢和有色玻璃，门使用了透明玻璃。
The stairs are steel and tinted glass, the doors transparent glass.
仔细检查墙壁，地板，门，楼梯，和窗户，以确保他们不会坠落碎片，或者倒塌。
Examine walls, floor, doors, staircases, and windows to make sure that the building is not in danger of collapsing.
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