N, N - diethylaniline was synthesized under normal tempreture with tetraethyl ammonium hydroxide as phase transfer catalyst. 以苯胺和溴乙烷为原料,用四乙基氢氧化铵作相转移催化剂,在常压下合成N, N二乙基苯胺.
到处都是人，全是邀请来的贵客名流。There were wall-to-wall people, all invited guests and celebrities.众多的好莱坞名流都去光顾珍妮特·沃恩的美甲店。The glitterati of Hollywood are flocking to Janet Vaughan's nail salon.他只邀请头等名流参加他的聚会。He only invited A-list...
motorcyclists with leather gauntlets戴着皮护手套的摩托车手His gauntlets contain a flamethrower, and a whipcord lanyard launcher.他的护手里安装了火焰喷射器和绳索发射器.Motorcyclists with leather gauntlets are waiting for the start of the game.戴着皮护手套的摩...
In the western of China are intricate terrains and many hilly regions.我国西部地区地势复杂,多丘陵....the devolution of power to the regions...向各地区的权力下放...the economic cleavages between the two regions.那两个地区之间的经济差距Irrigation is needed...
在表面形成的小凹坑起到应力增高源的作用.The small pits that form on the surface act as stress raisers.目的探讨先天性耳前瘘管及先天性耳后小凹的发生部位 、 并发症及遗传规律.Objective To explore position, complications and genetic rule of the CPF and PHEP.目的探讨放大内镜下胃小凹的形态分类及其临...
The theory of thermodynamics links the macroscopic and submicroscopic domains.热力学把宏观世界同亚微观世界联系起来.Macroscopic deviations from isotropy occur due to bedding, schistosity and also sometimes fracturing.与各向同性相差很大的情况往往产生于层理, 片...