本文探讨了数字相关通道失效实时自动切换的几种实现方法，着重失效信号的检测和切换指令的产生。
In this article several methods for implementation of the real-time automatic changeover of the digital related channels in failure are discussed.
气阀爆炸，供电系统失效，以及不准确火警信号。
Exploding steam valves, electrical feeder failures and inaccurate fire alarm.
总结：在调查月球上一块黑石发出的奇怪信号时，“探索者一号”上的宇航员发现随行的人工智能超级电脑(代号HAL 9000)出现功能失效。
Summary: While investigating a strange signal emanating from a large black monolith on the moon, the crew of Discovery One discover that their onboard AI (HAL 9000) is malfunctioning.
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