This paper reports the electron ionization mass spectra(EIMS)of eight 2,4,6trisubstituted pyrimidines derivatives.是什么意思_This paper reports the electron ionization mass spectra(EIMS)of eight 2,4,6trisubstituted pyrimidines derivatives.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句