Epoxidation and oxidation gave the racemic C 18 - juvenile hormone.通过环氧化和氧化就得到外消旋的含十八个碳的昆虫返动激素.In the epoxidation, chloroform and t butanol gave the best results.在环己烯环氧化反应中, 以氯仿和叔丁醇为溶剂时,环氧化反应的结果最好.Recent progress on asym...
He's been pinching money from the cashbox.他一直在偷钱箱里的钱.He led his life , pinching and scraping.他省吃俭用地过日子.Her flat head and nose were made by pinching the clay between the forefingers.她的平头和鼻子都作出捏食指之间的粘土.Frieda grinned,...
They are excavating a tunnel through the hill.他们在挖一条穿山隧道.Those workers were employed in excavating the foundations of the building.那些工人忙于挖掘建筑物的基础.It's a plentiful treasure house of intelligence which is worth excava...
When the chairman of Campbell's retired, McGovern was named as his successor.坎贝尔公司的总裁退休后，麦戈文被选定为继任者。The chairman of the bench adjourned the case until October 27.主审法官将案件延期到10月27日审理。The chairman decided to change the...