质子的质量几乎是电子的2,000倍。Protons are nearly 2000 times as heavy as electrons.自由基是一种具有未配对电子的分子碎体.A free radical is a molecular fragment having an unpaired electron.在物质中的贯穿能力,都是和电子的动能E有关的.Penetration in matter depends on the kine...
710年,西班牙遭到侵略;720年,烽火烧到了比利牛斯山脉.Spain was invaded in 710 and the Pyrenees mountains were reached in 720.谈判破裂,烽火再起.The flames of war went on when the negotiation broke down.察哈尔、上海等地的烽火已经燃烧起来了.The flames of war are already r...
The fourteenth century cathedral was reduced to a mass of rubble.这座14世纪的大教堂变成了一堆瓦砾。Two fourteenth-century manuscripts of this text are still extant.这个文本仍有两份14世纪手抄本存世。With the fourteenth century the real history of the Eu...