【英语时差8,16】微波炉如何加热食物？2
时间：2019-03-06 作者：英语课 分类：英语时差8，16
Microwaves heat water by jerking the water molecules 2 around, so to speak. Each water molecule 1 has a slight positive electric charge on one side and a slight negative charge on the other. As microwaves pass by, they exert forces on those charges, first one way, then the other, several billion times per second. These back-and-forth forces turn the water molecules one way, then the other, repeatedly breaking the temporary bonds that water molecules form with each other. It’s a kind of microscopic 3 stirring. The result of all this agitation 4 is more violent random 5 motion of all the water molecules in the food — in other words, the water gets heated. Microwaves reach all the water in the food at once, so all parts of the food are heated at once. A conventional oven heats food only from the outside, and that’s why conventional cooking takes longer than microwave cooking.
- 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。
- 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。
- It's impossible to read his microscopic handwriting.不可能看清他那极小的书写字迹。
- A plant's lungs are the microscopic pores in its leaves.植物的肺就是其叶片上微细的气孔。
- Small shopkeepers carried on a long agitation against the big department stores.小店主们长期以来一直在煽动人们反对大型百货商店。
- These materials require constant agitation to keep them in suspension.这些药剂要经常搅动以保持悬浮状态。