【英语时差8,16】糖为什么会溶解？
时间：2019-03-06 作者：英语课 分类：英语时差8，16
Did you ever wonder why sugar dissolves in a cup of coffee? Why not have the sugar just float in the middle of the cup, without dissipating into the coffee? It’s because of the way water molecules 2 interact with molecules in other substances. A water molecule 1 has powerful magnetic properties, because of the two positively 3 charged hydrogen atoms stuck to a negatively charged oxygen atom. A water molecule can actually break apart the bonds that hold together sugar molecules and insert itself in between them. This is what’s happening on a molecular 4 level when you see the sugar cube getting wet and crumbling 5 apart. Water molecules are busily inserting themselves between sugar molecules. Eventually they come between all the sugar molecules, dissolving the sugar cube.
- 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。
- She was positively glowing with happiness.她满脸幸福。
- The weather was positively poisonous.这天气着实讨厌。
- The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
- For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时，分子的碰撞就停止了。