虚拟化可能在利用这样的信息源上存在缺陷，或者说在同一台主机上容纳多个虚拟机运行环境可能会穷尽可用的信息源，导致薄弱的随机数生成机制。

Virtualization might have flawed mechanisms for tapping that entropy source, or hav-ing several VMEs on the same host might exhaust the available entropy, leading to weak random number generation.

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但是，在出现严重错误或故障的情况下，dmesg有时可能是系统上所发生情况的唯一良好的信息源。

But in the case of a serious fault or failure, dmesg can sometimes be your only good source of information on what is happening on your system.

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因此，通信的任务就是要克服信息源与接收者之间在地里上的障碍，迅速而准确的传递信息。

Communication task, therefore, is to overcome the obstacle of the information source and the receiver in the field between, rapid and accurate information.

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