In covalent bonding, atoms share electrons.在共价键联中, 原子共有电子.Crystals may be classified as either ionic or covalent by analogy with molecules.与分子的情况一样,晶体也可以分为离子键型和共价键型.Ceramics primarily have ionic bonds, but covalent bondi...
Halogen bond is known as a kind of non - covalent intermolecular interaction.卤键是一种类似氢键的分子间弱相互作用.Chemical bond mainly includes electrovalent bonds , covalent bonds, and metalic bonds.化学键主要有离子键 、 共价键 、 金属键.Additionally, co...
我打了个寒战，用围巾把脖子围得更紧了。I shivered and pulled my scarf more tightly round my neck.战争期间，琼帮妈妈给战士们织围巾。During the war, Joan helped her mother knit scarves for soldiers.她脖子上围着一条粉色长羽毛围巾。She wore a large pink boa around her neck....
She continued to have severe stomach cramps, aches, fatigue, and depression.她仍然患有严重的胃痉挛，感觉疼痛、疲乏、抑郁。Coca is well-known for reducing hunger, thirst and fatigue.人们都知道可乐能消饿、止渴和解乏。Symptoms of anaemia include weakness, fatigue...
Brazil says its constitution forbids the private ownership of energy assets.巴西称其宪法禁止个人占有能源资产。German law forbids the dumping of hazardous waste on German soil.德国法律禁止在德国本土倾倒有害废料。The Church's canon law forbids remarria...
It is really heartrending to see his own child sentenced.看到自己的孩子被判刑真叫人伤心.Please don't hurt me again, otherwise i'll heartrending hurt.请你不要再来伤害我,我会难过, 心象被撕碎一样.Don't you find it heartrending to see him get b...