Secondly, I discuss about the engineering theory system of EV from these aspects: energy system, electrical engineering system, energy management system, and electrification system.是什么意思_Secondly, I discuss about the engineering theory system of EV from these aspects: energy system, electrical engineering system, energy management system, and electrification system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句