field change短语⁷⁶⁷⁸⁶ 基本例句 字段改变 Secondly, the characteristics of lightning discharge channel were studied according to the fast electric field change, slow electric field change measurement, and lightning VHF source location. 其次，根据辐射源定位资料和闪电电场变化等多参量观测资料，分析了闪电放电过程的发展特征。 search.gucas.ac.cn