Cyclopropane rings are included within larger systems, such as triterpenes.三元环包含在较大的环系统中,像三萜类中.Under the optimum condition the yield of isopropyl cyclopropane carboxylate is 92 %.在最佳反应条件下,环丙烷羧酸异丙酯的产率达92%.Cyclopropane car...
We can't hold the two meetings at the same time; we must stagger them.这两个会不能同时开, 得错一下.Truman allowed him to stagger on for nearly another two years.杜鲁门允许他又硬撑了近两年。He picked up the heavy suitcase and set off with a st...
邀集有关人士讨论一下下一步干什么.People concerned have been invited here to discuss what to do next.他经常邀集一些朋友.He often invites friends to get - togethers.邀集有关人士讨论下一步干什么.People concerned have been called together here to discuss what to ...