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...
The steelworks provided employment for thousands of people.这家钢铁厂为数千人提供了就业机会.The local steelworks is running down and is likely to close within three years.当地的这家钢铁厂越来越不景气,有可能在三年内倒闭.There was a dull red glow in the night s...