An essential amino acid, C11H12N2O2, formed from proteins during the digestive process by the action of proteolytic enzymes.是什么意思_An essential amino acid, C11H12N2O2, formed from proteins during the digestive process by the action of proteolytic enzymes.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句