Nefedipine was synthesized with m - Nitrobenzaldehyde, ethyl acetoacetate ammonium acetate.以间硝基苯甲醛, 乙酰乙酸乙酯,氨化试剂为原料.The cross - linking reaction between dialdehyde compound and cellulose acetate raises the chemical stabil...
Ethyl acetate ( 71 . 41 b ) was added to the slurry in the vessel.把醋酸乙酯 71.4 磅加到容器中的浆液内.The reverse of Reaction 11 for acetate may be combined with the electron acceptor reactions.对于醋酸盐、反应11的逆反应可以与电子接受体反应组合在一起.In benzene...
The committee will need to winnow out the nonsense and produce more practical proposals if it is to achieve results.委员会若要取得成果，需要摈除不着边际的观点，提出更实际的建议。You should winnow out the inaccuracies of this paper this afternoon.你今天下午...
Edwin H. Conger was envoy extraordinary and Minister Plenipotentiary.埃德温·H.康格是特命全权公使。By the third lap Kinkead had touched 289 m.p.h.到第三圈时，金基德的车速达到了每小时289英里。The W.H.O. safety standard for ozone levels is somewhere about a...
他们正在挖蚯蚓作鱼饵.They were digging up worms to use for bait.一条鱼在轻轻地啃鱼饵.A fish nibbles at the bait.河里的鱼很多, 我钓线上的鱼饵也蛮好, 可这些鱼越来越狡猾,今天就是不上钩.There are plenty of fish in the river, and good baits on my line, but the fish are getting...
Her majesty awarded a distinction upon〔to〕 the retiring Prime Minister.女王陛下授勋给行将离任的首相。He must be getting near retiring age.他一定快到退休年龄了。She was a shy and retiring person off-stage.她在现实生活中是个腼腆而且不善社交的人。After retiring, Albrig...
Dimorphism The existence of two distinct forms.二型现象:出现两种不同的类型.These variables fishers and Bayes discriminant functions to distinguish sexual dimorphism the three strains.结果表明:不同品系性差不同,判别函数对于性别判定具有明显的实用价值....