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...
I refused to wear headphones because they can perforate your eardrums.我不愿戴耳机，因为它可能会使鼓膜穿孔。to perforate something with a pin用针在某物上穿孔In advanced stages the opaque corneas may ulcerate and even perforate.在疾病后期,不透明的角膜可能产生溃疡,甚...
爸爸打来电话让我去他办公室一趟。Daddy called and asked me to drop by his office.爸爸的办公室里总有大量的废纸。There's always tons of scrap paper in Dad's office.“他们演奏经典摇滚乐，”她的男朋友说道，“我爸爸也喜欢他们。”"They play classic rock'n"roll,' states...