Do polygraphs work? Not really, experts say. Use these tips instead.
测谎器有用么？并非如此，专家们说。不如使用以下秘诀。
You can guess, of course, whether the man was answering truthfully - but today's polygraphs cannot.
当然，你可能猜想这家伙在说假话，但今天所用的测谎仪却不能。
Law enforcement officials try to tap into that effort, for example with polygraphs, to find out if a suspect is telling the truth.
法律执行者们试图利用大脑的这种活动来确认嫌犯是否在说谎，他们所用的仪器是测谎仪。
The investigators say they need to validate this initial result and compare the technique with polygraphs and other lie detection tools.
研究者们说，他们需要进一步确认这些初始的研究结果，并把该项技术与测谎仪以及其它的测谎工具进行比较。
The investigators say they need to validate this initial result and compare the technique with polygraphs and other lie detection tools.
研究者们说，他们需要进一步确认这些初始的研究结果，并把该项技术与测谎仪以及其它的测谎工具进行比较。
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