Donors such as amine and phenolic groups,when positioned ortho to a nitro group,are always involved in intramolecular hydrogen bonding.是什么意思_Donors such as amine and phenolic groups,when positioned ortho to a nitro group,are always involved in intramolecular hydrogen bonding.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句