亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process.阳离子表面活性剂通常为季铵盐类.Cationics are usually quaternary ammomium salts.反 离子通常是钠, 钾和铵.The usual counter - ions are sodium, potassium an...
The writer analyzed the and disadvantage on phasing - out methyl bromide in China.本文分析了我国淘汰甲基溴的利弊.Other longwave DXers use special phasing units to reduce noise levels.其它longwaveDXers用途特别逐步采用的单位减少噪声级.Users can now invite...
We now omit the prime on the matrix elements.我们现在把各矩阵元素上的一撇略去.The matrix is defined as the reciprocal of A.该矩阵定义为A之逆矩阵.Local deviations depend strongly on the local geometry of the solid matrix.局部偏离严格地依赖于固体矩阵的局部几何形状....
Dives always have the best live music - directly proportional to how many felons they're serving given time.下等酒吧总有最棒的现场音乐 —— 乐队的好与坏直接与他们服务的蛇头多与少成正比....a proportional fee based on the final sale price.与最后销售价格成比例的费用Th...
他小心翼翼地跨过残余的隔墙。He moved carefully over what remained of partition walls.我们最好打通两个小房间中间的隔墙,来扩大阅览室的面积.We'd better enlarge the reading room by knocking through between the two small rooms.另一种与上述截然不同的块体是用来建造房间之间内隔墙的砌块.A v...
To include as many viewpoints as possible, the editor reserves the right to shorten letters.为了能包括尽可能多的观点，编辑保留对信件进行删节的权力。Before becoming a full-blown director, he worked as the film editor on Citizen Kane.在成为一名完全成熟的导演之前，他...