A method of synthesis of butyl isobutyrate catalyzed by amidosulphonic acid has been studied.以氨磺酸为催化剂催化合成了异丁酸丁酯,确定了酯化优化条件.The method about synthesis of approximate straight line motion mechanism based on moving centrode ...
The housemaster fixed Jack with a decidedly hostile look.房东恶狠狠地瞪着杰克.It's better that the housemaster guides the children when they are watching TV.孩子看电视时最好有家长在旁边指导....
夏洛特会用烹饪术的某种独特的“成就”使他平息下去.Charlotte would assuage him with some peculiar triumph of her culinary art.这是否因为我是广东人,并且认为我们的烹饪术天下最好?Is it because I am Cantonese and think that our cooking is simply the best?...
Count up to ten before you open your eyes.你数十个数再睁开眼睛.It is impossible to count up to infinity.不可能数到无穷大.Couldn't we just count up our ballots and bring them to the courthouse?我们就把票数汇总然后交给法院不好吗？...