服务器的负载凡是是低电压、相对于不变的高电流，不许可出现流向无效电源(failed power supply)的反向电流。下面我们将会商一些关于冗余电源设置的举出例子。
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If the server incorporates a redundant power supply, the backup supply keeps the server running until a technician can replace the failed power supply.
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。
The power supply on this instrument had failed, so it could no longer be used.
这个仪器的电源出故障了，不能再用了。
The first attempt to accelerate each of two opposing beams of protons to 3.5 TeV apiece failed when a power supply shut down inadvertently and a new magnet-protection system tripped, dumping the beam.
第一次尝试把两个加快的对立的质子束各以3.5兆电子伏特的电压加速时，遭到了失败。只是无意中关闭电源和一个新的磁保护系统跳闸，倾翻了质子束。
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