This is because the current the electrodes detect is weak, and a really good contact needs to be made between apparatus and skin.

这是由于电极要探测的电流非常弱，仪器与皮肤需要非常好的接触。

youdao

This is because the current the electrodes detect is weak, and a really good contact needs to be made between apparatus and skin.

这是由于电极要探测的电流非常弱，仪器与皮肤需要非常好的接触。

youdao