Explain why barium forms peroxide but beryllium does not.解释为什么钡能形成过氧化物而铍则不能。However the toxic properties of beryllium limit its application.然而铍的毒性限制了它的作用.Toxicity problem in manufacturing and storage might be alleviated ...
Amorphous beryllium hydride , as ablator, can increase conversion from laser to X - rays .非晶 BeH2 材料作为烧蚀层, 掺入高Z元素后可以提高激光 -X 光的转换效率.Toxicity problem in manufacturing and storage might be alleviated by coating beryllium wi...
Unfortunately, Grandma always seems to awaken at awkward moments...不幸的是，奶奶好像总是醒来的不是时候。The British never awaken to peril until it is almost too late.英国人从来不懂得防患于未然。awaken sb.’s to a sense of duty唤起某人的责任感Old people awaken e...
He was ably assisted by a number of other members.他得到其他一些成员的鼎力相助。At first we chatted agree-ably about his trips to London and Paris.一开始，我们愉快地聊起他的伦敦和巴黎之行。"I'm sorry, Andrew," she said reason-ably.“我很抱歉，安德鲁，”她很懂事地说道。...
他翻了个漂亮的后翻跟头.He did a brilliant backward somersault.翻跟头是他们的基本功.Turning somersault is their basic skill.心里早就发痒的猴子们一哄而下, 在网里翻跟头 、 打滚.Heart of the monkeys have an itch coax and, in the network, Fan Gentou, falling over....