Aryl nitriles were obtained by the reactoin of the corresponding carboxylic acids with urea in the presence of sulfamic acid in solvent.是什么意思_Aryl nitriles were obtained by the reactoin of the corresponding carboxylic acids with urea in the presence of sulfamic acid in solvent.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句