The corresponding chest electrodes serve as the positive poles.

相应胸电极是极。

And so there's two different poles, a negative and a positive pole here.

所以这里有两极点，负极和极。

Lead I uses the Right Arm as the negative pole and Left Arm as the positive pole, forming a vector that goes to the right.

I导联将右臂作为负极，左臂作为极，形成指向右侧（左臂）向量。

They use ONE limb electrode as the positive pole, and take the average of inputs from the OTHER two as the zero reference.

它们将1肢体电极作为极，并取另两肢体电极输入平均值作为零参考。

Thus, the position of the positive pole is the " point of view" , and the line connecting the 2 poles is the " line of sight" .

因此，极位置是“视角”，连接两极线是“视线”。