A joystick allows the safe room occupant to lock and unlock doors throughout the house to trap an intruder.

控制杆可让安全密室里的人锁上或打开房子里的任何门，来捕捉入侵者。

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Since large expanses of glass would trap the heat in this environment, the Architects devised a system of louvered wooden sliding and folding shutters for the doors and Windows.

由于大面积的玻璃将捕获此环境中的热量，建筑师设计了一个Windows系统的木质百叶窗，折叠推拉门和百叶窗的。

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That might well explain why the keys felt less like springboards, and more like trap doors.

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In fact, some security firms told a Senate Committee of finding hidden "trap doors" left behind by contractors and there is no way to know if they were left for benign or malicious reasons.

CNN: Senate report: Nation at risk of Y2K-related terrorism