她接受了这个令人为难的差事，负责打头几个电话。She had the unenviable task of making the first few phone calls.好吧，也许我在那件事上使你为难了。Well, maybe I stumped you on that one.与 姻亲 之间的矛盾常常让人两面为难.Rows with one's in - laws often create divided loyalti...
不可滥服古柯碱.Don't have cocaine abusively.马钱子碱 、 砷和鸦片都是毒药.Strychnine, arsenic, and opium are poison.酸能使碱中和,碱亦能使酸中和.Acids neutralize alkalis and vice versa....
The corresponding reaction of acetaldehyde is subject to general base catalysis.乙醛相应的反应服从广义的碱催化.During alcoholic fermentation acetaldehyde acts as a hydrogen acceptor instead of oxygen.在这个过程中乙醛取代了氧作为氢的受体.Alcohol dehydrog...
We don't train them only in bricklaying, but also in other building techniques.我们不仅仅训练他们砌砖，而且教给他们其他建造技术。Now, I'm going to show you something about bricklaying.我现在要告诉你一些有关砌砖的事.That's a skillful piece of bri...
Are cavernous sinus hemangiomas and cavernous malformations different entities?海绵窦血管瘤和海绵状血管畸形是不同的病变 吗 ?Hemangiomas are the most common benign vascular tumors of andand neck region.血管瘤是婴幼儿最常见的先天性良性血管肿瘤,约60%发生于头颈部.Objectiv...