Tingroom Radio—蜂蜜为什么变硬？
时间：2018-12-27 作者：英语课 分类：英语时差8，16
Why Honey Turns Hard If a little honey drizzled 1 on a piece of homemade toast or into a cup of tea is how you like to start the day, you’re not alone. One drawback to honey, though, is that after sitting too long on the shelf, it crystallizes and that soft, amber 2 liquid turns to a hard, gooey mass. Actually, though, only part of the honey is crystallizing. Honey is made mostly of two kinds of sugar: glucose 3 and fructose. What crystallizes is the glucose, so the more glucose there is in comparison to fructose, the more likely it is to crystallize. But before honey can crystallize, it needs what’s called a “seed” for the crystals to grow on. The seed might be a grain of pollen 4, a speck 5 of dust, or even a scratch on the inside of the jar. But the best seed of all is a bit of honey that has already crystallized. Most of the honey in a supermarket has been heated and filtered to remove virtually all the possible seeds. That slows the crystallization, but the heating process also drives off some of the honey’s distinctive 6 flavor. When honey does crystallize, you can soften 7 it again in a microwave or a pan of warm water, but as it cools the crystallization will begin again–faster even than before. Honey crystallizes faster the second time because heat alone can’t remove all the seeds. Dust, crumbs 8, and other tiny particles that have accumulated since you first opened the jar will remain as seeds to start the process all over again.
- The dew on the branches drizzled our hair and shoulders. 枝头上的露珠润湿了我们的头发和双肩。
- It drizzled throughout the night. 毛毛雨下了一夜。
- Would you like an amber necklace for your birthday?你过生日想要一条琥珀项链吗？
- This is a piece of little amber stones.这是一块小小的琥珀化石。
- 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。
- Hummingbirds have discovered that nectar and pollen are very nutritious.蜂鸟发现花蜜和花粉是很有营养的。
- He developed an allergy to pollen.他对花粉过敏。
- I have not a speck of interest in it.我对它没有任何兴趣。
- The sky is clear and bright without a speck of cloud.天空晴朗，一星星云彩也没有。
- She has a very distinctive way of walking.她走路的样子与别人很不相同。
- This bird has several distinctive features.这个鸟具有几种突出的特征。