Application of samarium diiodide in mediating intramolecular cyclization reactions was reviewed.综述了二碘化钐在分子内环化反应中的应用.Sodium ethylate was used as catalyst in Baker - Venkataraman of cyclization, and all factors were studie...
before的近义词有：ago, before,before, in front of, in the front of。下面这两个副词均含"……以前"的含义：ago ：指从现在起往前推算一段时间，始终置于所修饰的词之后，与一般过去时连用。before ：或指从过去某一时间起向前推算的若干时间的以前，通常与过去完成时连用；或泛指以前，并不具体指若干时间以前，可使用现在完成的或过去时；还可指从将来某一时间起的若干时间以前。下面这些前置词(...
They were spotted after three hours adrift in a dinghy.他们在小舢板上漂浮了3个小时后才被发现。The three of us manhandled the uncovered dinghy out of the shed.我们三个人把无篷小划艇推出了棚子。The dinghy gathered speed as the wind filled her sails.风鼓起了帆,小帆船...
他不明白自己怎么也居然成为了恐怖的第三十五号修正案的辩护士了.How, he wondered, had he become a champion of the horrendous 35 th Amendment?这个意见很好, 被告的辩护士立刻采取了这一着.It was a good idea, and caught at by the counsel for the defense.那些罪犯的辩护士甚至可以帮助杀人犯逃脱罪责.Cr...
现在是个机会，蔬果店可通过销售土产胜过超市。Here is a chance for greengrocers to win out over the supermarkets by selling local produce.当地的那些小旅馆通常是既肮脏又尽是跳蚤; 食物只不过是本地土产乳酪就着存放了经常12个月的陈面包, 都用粗制的酒送下肚去.Such inns as there were were generally dirty ...