其实它并不一定是真正的软件，也可能是技术员们一些令人难以理解的想法，就像在家里运行一个服务器。

And it's not really software, but it should be: the impenetrable techie trick of running a home server.

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如果服务器包含一个冗余电源、后备供应保持服务器运行，直到一个技术员能取代失败的电源。

If the server incorporates a redundant power supply, the backup supply keeps the server running until a technician can replace the failed power supply.

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在这里，一个技术员就给你们解释电梯的工作运行情况和许多的安全设置。

There, a technician wil explain how an elevator works and will explain the many safety features elevators have.

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