以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸高铈为催化剂,正丁酸和异戊醇为原料合成了正丁酸异戊酯.Isoamyl butyrate was synthesized by using ceric sulfate as the catalyst.以硫酸铈铵为催化剂,...
汽油是一种能去掉油污的有溶解力的液体.Gasoline is a solvent liquid which removes grease spots.因为,其实溶解力 、 大量的普遍性存在,以及持久性,才是“弱之胜强,柔之胜刚”的真实原因.The reasons of penetrating stone are solvency, large proportion of ubiquity and duration.正丁醇对硝化纤维素具有...
My life seems to be in a groove. I do the same things day after day.我的生活似乎很单调, 日复一日地干着同样的事情.The bevel milling cutter for cutting groove of oil casing - pipes was designed.设计了用于油气田管道坡口切割的角度铣刀.A grooving machine is develop...
她不再不停地指责他总不在家了。She had stopped nagging him about never being home.精心搭配的室内装饰似乎已不再受欢迎了。Interior decoration by careful coordination seems to have had its day.生孩子是使自己不再年轻时尚的最快方法。Having children was the quickest way to lose y...