Tert - octylamine was prepared with di - isobutene and hydrocyanic acid as mine feed. The yield was high.以二异丁烯和氢氰酸为主要原料,高收率地制备叔辛胺.This paper discusses the commercialized production methods of several chemicals using hydr...
每条连衣裙都缝上了褶边，并经过严格的检查，不允许有任何瑕疵。Each dress is hemmed and scrupulously checked for imperfections.这项研究工作毫无瑕疵，怎样称赞都不过分。It is difficult to praise this immaculately researched work too highly.加纳在人权方面并非毫无瑕疵。Ghana does not have a...
The summations of forces in this and that directions must be zero.在这个和那个方向上的合力必定为零.Summations are almost invariably indicated ellipses instead of the more prevalent sigma notation.在表示“连加”的式子中,几乎一成不变地使用省略号来代替更为流行的“∑”符号....
Massage is used to relax muscles, relieve stress and improve the circulation.按摩可以使肌肉放松，缓解压力和促进血液循环。Relax as much as possible and keep breathing steadily.尽量放松，保持平稳呼吸。Relax, smile; loosen up in mind and body and behaviour....
When he talks, he only gives glimpses of his real self.当他讲话时，他只流露少许个人的真实想法。We have only vague and tantalizing glimpses of his power.我们只能隐隐约约地领略他的威力,的确有一种可望不可及的感觉.In the sea of grinning, unfamiliar faces he caught glimpse...