【英语时差8,16】历史最悠久的甜味剂（下）

But the reason honey helps keep baked goods fresh has to do with the ability of sugar to attract and hold onto water molecules². All these sugars are “hygroscopic,” that is they attract and hold onto water, each sugar molecule¹ holding several water molecules. By holding onto water, the sugar helps keep moisture from escaping from the food and so keeps it tasting fresher longer. But when two sugars, like fructose and glucose³, bond to each other, they lose some of their ability to bond to water molecules. And that means your bread or cake will lose water faster. Honey’s attraction to water is also why candy made from honey tends to get stickier than candy made from sucrose, or table sugar. Commercial bakeries use chemicals like Polysorbate to keep baked goods fresh, but with honey you can do it naturally. Incidentally, if you’re worried that honey will make your cake too heavy, try beating the honey until it’s frothy before adding the other ingredients.

1 molecule   

n.分子，克分子

参考例句：

• A molecule of water is made up of two atoms of hygrogen and one atom of oxygen.一个水分子是由P妈̬f婘̬ 妈̬成的。
• This gives us the structural formula of the molecule.这种方式给出了分子的结构式。

2 molecules   

分子( molecule的名词复数 )

参考例句：

• The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
• Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。

3 glucose   

n.葡萄糖

参考例句：

• I gave him an extra dose of glucose to pep him up.我给他多注射了一剂葡萄糖以增强他的活力。
• The doctor injected glucose into his patient's veins.医生将葡萄糖注入病人的静脉。