A compound containing a benzene ring in which two of the carbon atoms have been replaced by nitrogen atoms,especially any of three isomers having the composition C4H4N2.是什么意思_A compound containing a benzene ring in which two of the carbon atoms have been replaced by nitrogen atoms,especially any of three isomers having the composition C4H4N2.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句