I could have chosen my zero point of potential energy anywhere I please.
作为重力为0的点,我可以选择这里。
I could have chosen it right here and nothing would change other than that I offset the zero point B of my potential energy.
除了会抵消零点,势能什么的,都不会变,但是如果我从A到。
There is voltage to ground between ground part of electric equipment and point of zero electric potential of earth.
电气设备的接地部分与大地零电位点之间存在对地电压。
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