以酸性黑油为原料合成咪唑啉.The imidazoline was synthesized from black acid liquid.目的:探索出在咪唑啉酮2号位引入2-巯基苯骈噻唑的适宜反应条件.Objective To optimize the reaction condition of 2 - mercaptobenzothiaozole ramification.以环烷酸、有机胺为原料合成咪唑啉油溶性缓蚀剂.A new ty...
他此刻正在南美旅游观光。He's touring South America at this moment in time.最好是乘坐旅游巴士或骑自行车观光。Sightseeing is best done either by tour bus or by bicycles.观光巴士已经取代了火车。Tour buses have replaced railway cars....
Every year, 250,000 people enter the job market.每年有25万人进入就业市场。Put your best foot forward and work on the assumption that there is an acceptable solution to every problem you are likely to face.要尽力而为，要相信你可能遇到的每一个问题都会有一个适当...
Clarence screws up his face and imitates the Colonel again.克拉伦斯又板起面孔，模仿起上校来。Art often imitates nature unknowingly.艺术经常会在不经意中模仿自然。He imitates people to perfection.他模仿别人,惟妙惟肖....