Medicine intermediate N - ethylethylenediamine ( NEED ) was synthesized from acrylamide and ethylamine by addition reaction and Hofmann rearrangement. 以丙烯酰胺为起始原料,经乙胺加成后,再经Hofmann重排两步反应后合成了药物中间体N - 乙基乙二胺 ( NEED ).
May all beings be happy and secure ; may their mind be contented!愿所有的人都幸福安宁，内心满足！Your future in the company is secure.你在公司的前途有保证。Trade discounts may be used as a competitive stratagem to secure customer loyalty.商业折扣可以用作维...
首相授予他贵族爵位。The Prime Minister offered him a peerage.他们甚至可能生个儿子, 继承史丹的爵位.They might even have a son, heir to the earldom of Stane.合众国不得颁发任何爵位.No title of nobility shall be granted by the United States....
We would like to convert the loft into another bedroom.我们想把阁楼改造成又一间卧室。He was a recent Catholic convert, and very zealous.他最近才皈依天主教，是一名狂热的信徒。Christians were arrested for trying to convert people, to proselytise them.基督徒因为...
a deafeningly loud bang震耳欲聋的巨响All of a sudden there was a terrific bang and a flash of smoke.突然传来惊天动地一声响，还冒出一股烟。The festival started with a whimper rather than a bang.庆祝活动出乎意料地悄然开始。The car ran slap ( - bang ) into the wa...
为了防止有人跟踪我，我特地绕了弯路。In case anyone was following me, I made an elaborate detour.我临走时特地事先把办公桌清理了一下。I took the precaution of clearing out my desk before I left.她特地为看你而来.She came for the express purpose of seeing you....