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...
α粒子是从天然放射性蜕变得到的带正电的氦核.Alpha particles are positively charged helium nuclei obtained from natural radioactive decay.粒子 —— 氦核 —— 正通过试管被抛出, 从而在试管中形成人造迷雾.Alpha particles -- helium nuclei -- were being hurled through the tube...
Halve the pineapple and scoop out the inside.将菠萝对半切开，挖出里面的果肉。Halve and deseed the peppers.把辣椒切成两半并去籽。Halve the tomatoes, then cut them up coarsely.把西红柿切成两半，然后再粗粗地切一下。...