Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水杨酸和乙酸酐为原料,采用无水碳酸钠作为催化剂经O - 酰化反应合成了阿司匹林.In 2002, we develop Photo - catalyst & electronic Ionizer A...
All the sudden trainings was to prepare for this?所有的突发事件训练对这有用 吗 ?Are there any IT trainings for staff in the service unit?有否向服务单位员工提供资讯科技培训?Trainings, tests and the subsequent analysis are easily performed.培训, 测试和结果的分析能...
For this old trouper there is still no business like show business.对这位老剧团演员来说仍然是娱乐性行业最好.Thanks for helping, you are a real trouper.谢谢你的帮助, 你真是信得过的人....
Joan is a brilliant conversationalist.琼非常健谈。He is even - tempered, easy - going and an excellent conversationalist.他是处事不惊的, 待人 随和,同时也是个非常健谈的人.Right, people skills include being friendly , being a good conversationalist, ...
He was clumsily trying to grab at Alfred's arms.他笨手笨脚地想抓住艾尔弗雷德的手臂。There was a splash and something fell clumsily into the water.扑通一声，有东西重重地掉进了水里。The rooks flew clumsily towards their nests.那些秃鼻乌鸦笨拙地飞向它们的巢。...
Acute dilatation of the stomach is a rare complication.急性胃扩张是一种罕有的并发症.They are known as the dilatation energy and the distortion energy, respectively.它们分别称为膨胀和变形能.As dilatation occurs, capillaries become abnormally perme...