Here, free electrons rub off the con ductor and create a charge imbalance that causes the current flow.

这时，摩擦引起自由电子脱离导体，产生电荷不平衡，从而产生电流。

A new type of lightning guard, which takes the place of the traditional lightning con- ductor-A semi-conductor lightning eliminator has come out.

取代传统避雷针的一种新型防雷装置——半导体消雷器已经问世。