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...
I see my role as being a catalyst for change.我认为我的角色是促成变革。A catalyst is a substance which speeds up a chemical reaction.催化剂是一种能加速化学反应的物质.It acts as a catalyst in the process of fermentation.它在发酵过程中起触媒的作用....
她赢得了一笔拨款，用以扩展自己的企业。She won a grant to develop her own business.各自然科学学科可能都得不到任何拨款。Whole branches of science may not receive any grants.法国总统许诺为法国明年的援助经费拨款1.5亿美元。The French President is pledging $150 million in French aid n...
这儿有人给我擦皮鞋 吗 ?Can I have my shoes polished here?吉姆靠给人擦皮鞋为生.Jim made a living by shining shoes for people.我们提供预请总机叫起床, 存放贵重物品的箱子, 全日包伙食和擦皮鞋.We offer morning call, safety deposit box, full pension and shoe polishing....
上半赛季我一直走背运。I had a lot of bad luck during the first half of this season.背运据说是指被人用咒语镇住了.A hex is believed to be an evil spell that is put on someone.不过,并非所有的迷信都与背运有关.But not all superstitions are about bad luck....