Maltose is a reducing sugar because its aldehyde group is free to react with oxidants and, in fact, to undergo almost all reactions as though it were present as a free aldose.

• 麦芽糖是一个还原糖因为它的醛基是游离的可与氧化剂反应,事实上如果它是一个游离醛糖,可以发生几乎任何反应。