请勿接触任何会为通向被测电路的共用侧或电源地的电流提供通路的物体。
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground.
如果信号源和电路不是用电容耦合而是直接相连，从基极到负电源线就会一个低阻通路，并且这将影响到电路偏置状态。
If the signal source were direct connected instead of capacitor coupled, there would be a low resistance path from the.
用于这类用途的传感器需要具备以下几个特性：材质柔软的无线通路来满足患者的舒适需求、无需特别维护、无需外部电源、成本低廉；
Sensors for such applications needto be flexible and wireless for patient comfort, maintenance-free and notrequiring external energy supply, and cheap enough to permit disposable use toensure hygiene.
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