In the melting process, the shape of the unmelted ice showed obvious difference, the top of the ice in the high voltage electric field was concave and this ice was electricized with negative charges.

• 在融化过程中 ,冰的形状出现明显的差异 :施加电场后冰块的上表面出现下凹 ,并且冰块贮存了负电荷。