The common multiple pole expanding method for retarded potential of electromagnetic field is corrected and replenished. Employing Taylor series method the exact result of the first three terms in multiple pole expansion is achieved.是什么意思_The common multiple pole expanding method for retarded potential of electromagnetic field is corrected and replenished. Employing Taylor series method the exact result of the first three terms in multiple pole expansion is achieved.在线翻译_英语_读音_用法_例句