剑桥词典a sugar that is formed of two single sugar molecules 二糖（由兩個單糖分子組成的糖類） Sucrose is a disaccharide made of one fructose and one glucose molecule . 蔗糖屬於二糖，由一個果糖分子和一個葡萄糖分子組成。 返回 disaccharide