This disorder, apparent within 10 days of birth, occurs when brush-border lactase activity (required for the digestion of lactose) in the small intestine is low or absent at birth and is characterized by diarrhea and malabsorption.是什么意思_This disorder, apparent within 10 days of birth, occurs when brush-border lactase activity (required for the digestion of lactose) in the small intestine is low or absent at birth and is characterized by diarrhea and malabsorption.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句