他们负责测量生命体征，如血压，温度，脉搏和呼吸。
They take vital signs, such as blood pressure, temperature, pulse and respirations.
它们所能记录的脉搏、呼吸、皮肤温度和其它信号，只能提示某人在回答一个非常不利的问题时似乎有些紧张。
All they record are pulse, respiration, skin temperature, and other signs that may suggest whether someone seems nervous when asked a damning question.
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