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 ).
警察冲进去将他拘捕并没收了可卡因。The police moved in, arrested him and impounded the cocaine.我写了信给他，但一直没收到回信。I wrote to him but I never had an answer back.下令没收了他150多万英镑的盈利。He was ordered to forfeit more than £1.5m in profits....
我正忙于砍掉这些蘑菇头.I was busy chopping up the caps of the mushrooms.头盔使我看是去象个蘑菇头.Helmets make me look like a mushroom? head!本文以水力学模型实验研究了底吹喷枪出口端蘑菇头的形成机理及控制模型.The mechanism and modelling of mushroom + forming at the tip of bot -...
His walk was lithe and graceful.他走路轻盈而优雅。He stretched his lean, lithe body.他伸了伸他那瘦削, 灵活的肢体.He was lithe; that was the word she had thought of while watching him.他很轻捷, 当时她望着他时想到的是这个词....
He struts and preens like a peacock and believes he is worthy of adoration.他像孔雀一样趾高气扬,认为自己应该受到爱戴.He introduced himself as 'the leader' and strutted up and down like a peacock.他自称“领导”，像个孔雀似的趾高气扬地走来走去。He was a bo...
Unfortunately weather was just so - so , so the Matterhorn was always partly covered by clouds.可惜的是由于天气不是很好, 所以马特宏峰总是被部分云朵遮挡住."How's it going?" — "So-so."“进展如何？”“马马虎虎。”Their lunch was only so-so.他们的午餐只能算是凑合。...
Their subsistence comes from the sea.他们依赖海洋生活。Their main mode of subsistence is hunting.他们主要以打猎为生。They were living barely above the level of subsistence.他们的生活水平勉强在最低水平线以上。Many families are living below the level of subsi...