He himself seemed totally unconscious of his failure.
他本人似乎完全没意识到自己的失败。
If the DC power system failure, often caused the entire communications were totally disrupted.
如果电源系统发生直流故障，常常会造成整个通信的全部中断。
If the DC power system failure, often caused the entire communications were totally disrupted.
如果电源系统发生直流故障，常常会造成整个通信的全部中断。
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