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 )....
我只想祝福你圣诞快乐。I just wanted to wish you a merry Christmas.歌声缭绕在人群上方，如同低声祝福。The song hovered, like a whispered benediction, above the crowd.莉娜身体很好，还让我转达她对你的爱和祝福。Lina is fine and sends you her love and best wishes....
她的嗓音非常好，现在的唱功比以往任何时候都要好。She's got a great voice and is singing better than ever.赎罪善功an act of penance每个人都有他的功和过.Each man has his merits and demerits....
All organic beings are striving to seize on each place in the economy of nature.一切生物都争取自然机体中的地位.People will seize on any opportunity to reduce competition.人们会抓住一切机会减小竞争.I never dreamed how the Chinese would seize on this...