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...