And what we tried with the pig was external electrodes on the skin, like you see in an emergency room, and I'm going to show you why they don't work very well.
我们首先尝试的是在猪的皮肤上做外部电极测试， 这种测试就像你在急诊室看到的那样 然后我会向你解释这种方法效果不太理想的原因。