The surface itself is an equipotential.表面本身是一等位面.Lines within the field along which the voltage is constant are called equipotential.在电场中电压根等的那些曲线称为等位线.At each crossing of an equipotential and a field line, the two are p...
Avoid muscle strain by warming up with slow jogging.先慢跑热热身，免得拉伤肌肉。Many people are worryingly ignorant of the facts about global warming.许多人竟然不知道地球变暖的事实,实在令人担忧。The water temperature originates in geothermy warming rate an...