You're in conversation with one person but the signal to noise ratio is low, meaning his voice, the signal, is quiet relative to the ambient conversational noise.
你正在和一个人谈话，但是信号和噪音的比率低，也就是说，对方的声音(信号)，相对于周围的谈话声(噪音)是安静的。
The voice of the institution is never conversational; it can be pedantic or persuasive, but it is never engaged, because there is no singular human to engage.
机构当中的各种声音从来就不健谈；这些声音可能显得书生气也可能说服性十足，但它永远都不投入，因为没有单个的个人能够参与其中。
Control your voice. Your voice should reflect the warm, easy, conversational tone as if you were talking to a good friend.
控制你的声音。你的声音应该热情、随和。仿佛你正与一位好朋友在交谈。
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