The carbon is electrophilic centre.碳是亲电的中心.It will become deepen to the students'recognization in mechanism of Aryl electrophilic substitution.这些问题的讨论将深化学生对芳烃亲电取代反应机理的认识.The rate constants of radical and electrophil...
An estimated one million Ethiopians eventually died as a result.估计约有100万埃塞俄比亚人最终因饥荒而死去.The Ethiopians have a crying need for more food immediately.埃塞俄比亚人急切需要更多的食品.Are ye not as children of Ethiopians unto me, O children ...
争夺斯柯达股份的竞争极为激烈。Competition has been fierce to win a stake in Skoda.20世纪70年代，急于分一杯羹的柯达公司推出了自己的拍立得相机。In the 1970s Kodak, anxious to get in on the act, launched its own instant camera.这种想法使得柯达走在了改造计算机产业运动的最前沿。Such thinking ...
Objective To explore the related factors to pharyngocutaneous fistula after total laryngectomy.目的探讨全喉切除手术后咽瘘发生的原因.The most common complications were cardiopulmonary insufficiency, lung infection, atelectasis pain and ana...