Link two of them together, and you've got a disaccharide, lactose, maltose, or sucrose.

把这些糖两种连接起来， 你就得到了二糖，乳糖，麦芽糖或者蔗糖。

Sucrose, or table sugar, is another disaccharide and it's formed when fructose links up with glucose.

蔗糖是另一种双糖，又称白砂糖，它是由一分子果糖一分子葡萄糖结合而成。

So simple sugars, whether they're natural or added, are mixtures of monosaccharides or disaccharides.

述简单糖类，不管是天然糖还是添加糖，都是单糖与双糖混合。

Mono- and disaccharides come from fruits, honey, sugar beets and sugar cane, while polysaccharide starches come from veggies and grains.

单糖双糖来自水果、蜂蜜、甜菜甘蔗，而多糖淀粉来自蔬菜。

Now when you eat something like a piece of onion bread, enzymes start breaking down disaccharides, oligosaccharides, and polysaccharides into monosaccharides so they can be absorbed.

当你吃东西时，比方说一片洋葱面包，消化酶便开始将食双糖、寡糖、多糖分解为单糖，以便人体吸收。

Maltose is another disaccharide and this one is two glucose molecules linked together, and it's found in molasses which can be used as a substrate to ferment beer.

麦芽糖也是一种双糖，由两分子葡萄糖组成，多存在于糖浆，可以用作啤酒发酵底。

It's known as milk sugar because it's only found in nature when it links with glucose to form lactose, a disaccharide found in the milk of mammals, which includes cow and human breast milk.

这是因为半乳糖在自然以与葡萄糖结合形式存在，它们结合形成一种双糖，即乳糖；牛乳、母乳等哺乳动乳汁都含有乳糖。