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...
When the Berlin Wall came down it wasn't just the roads that opened up but the waterways too.柏林墙一倒，不仅是陆路，连水路也开通了。The city is intersected by three main waterways.该城市由3条主要水路贯穿。On the other hand, federal regulation has...
What has Longfellow the most successful of them all, to offer us?他们中最成功的文人是朗费罗, 可是他又给我们提供了一些什么 呢 ?Longfellow was lucky in securing a professorship of modern languages at Harvard.朗费罗能够在哈佛大学当上现代语言教授是出于幸运.Nor was Longfellow...
最近几周，要求将他解职的呼声越来越高。Demands for his dismissal have gathered momentum in recent weeks.那些被裁的人都收到他们应得的薪金, 再加上假期和解职的酬金.Those laid off received their regular checks, plus vacation and severance pay.有人怀疑他是由于人事上的原因而被解职的.One susp...