Sodium ethylate was used as catalyst in Baker - Venkataraman of cyclization, and all factors were studied.环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂, 研究了影响反应的各个因素....
They are all filed alphabetically under author.这些都是按照作者姓名的字母顺序归档的。The catalog is organized alphabetically by label name.这个目录按标签名的字母顺序排列而成。I’ve arranged the books alphabetically so don’t muddle them up.我已按字母顺序把这些书整理了,千万不要...
任何一种交流都不仅要有说话者，还要有听者。Communication of whatever sort involves not just a speaker but a hearer too.这台计算机必须听说话者说话两小时后,才能 “ 听懂 ” 他的口音.The computer must listen to the speaker for two hours to " learn " the voice.这样的 自我 描述会给说话...
通常阳离子交换量随破裂增加而增大.Cation exchange capacity generally increases with an increase in broken bonds.亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process.溴、氯阳离子化合物的数量受局限.The number of ca...
Anti-perspirants stop wetness, deodorants stop odour.抗汗剂防止汗湿，除臭剂去除臭味。Whatever his wetness, his brains were dry enough.不管他有多湿, 他心里却非常干枯.His solemn eyes were too bright . And down one cheek was a track of wetness.他那严肃的双眼异常...