Adamantane and bicyclo ( 222 ) octane are predominantly Chlorinated at the bridge heads by this procedure.金刚烷和二环〔222〕辛烷主要是按照这个程序在桥头氯化.Using tendo - tetrahydrodicyclopentadiene as raw material and AlCl _ 3 - trace water s...
他认为我的讲话有两点欠妥.He faulted my speech in two ways.他觉得这个比喻欠妥.The analogy left him unsatisfied.吹嘘自己的学识是欠妥的.It is not in good form to brag of your learning....
British Parliamentary procedure is perplexing at the best of times.即使在最好情况下，英国议会的程序也很费解。It took years to understand many perplexing diseases.许多疑难病症要耗时数年才能搞明白。This might seem very perplexing to those who know nothing abou...