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。
The closest equivalent to a DDOS attack in the offline world would be a mass sit-in or a mob milling around a building, making entry and exit impossible.
现实世界里，最接近分布式拒绝服务攻击的则是大规模静坐或乌合之众，他们把建筑物围得水泄不通，没人可以进出。
The second floor has been imported as an attic to make the building looks like a single story house that spreading along the horizontal exit.
进入二楼是阁楼，使建筑看起来像沿水平出口伸展的单层房屋。
When triggered by the building's fire alarm control panel, it alerts building occupants to the location of the nearest exit using directional sound.
当大厦的火警警报控制面板被触发，该扬声器会使用定向声音引导住户到最近的出口。
The building comprises an emergency exit that is connected by an airlock at least to the interior of the building.
建筑物包括紧急出口，该紧急出口由气锁至少连接至建筑物的内部。
The building comprises an emergency exit that is connected by an airlock at least to the interior of the building.
建筑物包括紧急出口，该紧急出口由气锁至少连接至建筑物的内部。
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