There is a fire exit on each floor of the building.
这栋建筑每层楼都有个消防通道。
You may choose any item from a particular floor, or may choose to go up to the next floor, but you CANNOT go back down except to exit the building.
你可以在任何一层选择任意商品，你也可以选择登上下一层，但是，你不能往回走，除非你要离开商店。
Exit immediately at your floor. Do not wait for others behind you.
到达楼层立即出电梯，不要等待身后的人。
Exit immediately at your floor. Do not wait for others behind you.
到达楼层立即出电梯，不要等待身后的人。
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