这是心理学家和语言学家们研究多年的领域，他们想出一种对欺诈发出信号的指示器。
It's a field psychologists and linguists have studied a lot over the years, and they've come up with certain indicators that signal deception.
如果输入信号电平超过可编程阈值，粗调阈值上限指示器就会变为高电平。
If the input signal level exceeds the programmable threshold, the coarse upper threshold indicator goes high.
该转换器上有两个LED指示器指定信号和电源。
There are two LED indicators that designate signal and power.
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