- 双语例句 更多例句
The that sulfamic acid is an excellent catalyst for synthesis of acetophenone cyclic ethylic ketal.
以氨基磺酸为催化剂,通过苯乙酮和乙二醇反应合成苯乙酮环乙二缩酮.
网络文摘精选
- 今日热词
- 热门搜索
- greedy adj.贪吃的;贪心的;贪婪的;渴望的;
- gaiety n.快乐;高兴;作乐;花哨;
- gale n.大风,暴风;(突发的)一阵;<诗>微风;[植]香杨梅;
- has it 有了;
- workforce n.全体员工;劳动力;
- keep v. 保持;继续(做某事);(为某人)保留,留下;记下,记录,记载;开设,经营,管理(商店或餐馆);保护;(使)处于;遵守;保守(秘密);放,存放,贮存(在某处);养;保有;供养;使耽搁;守门;健康状况如何;保持不坏vi. (食品)保持新;保持健康;
- 假期 vacation;leave;vac; holidays and paid leaves of absence;(休假期间) period of leave;holiday;hols ;
- desperate adj.拼命的;孤注一掷的;极需要的;极困难的;极严重的;绝望的;
- dory n.平底的小渔船,海鲂;
- suggestion n.建议;暗示;表明;些微;联想;
- upper adj.较高的,上面的;上部的;n.鞋帮,靴面;兴奋剂;
- night-club 夜总会

