In this thesis, the normal form of open-phase operation in large powerunit is analyzed in theory with the method of sym-metry-ponderance.是什么意思_In this thesis, the normal form of open-phase operation in large powerunit is analyzed in theory with the method of sym-metry-ponderance.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句