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...
He was buttoning down his shirt.他正在扣紧衬衣.She was looking luscious in a flannel shirt.她穿着法兰绒裙子,看上去楚楚动人.A polyester shirt would be cheaper than a cotton one.涤纶衬衫比棉衬衫便宜。He had no shirt on under his thin jumper...他在薄套头衫里面没有穿衬...
There is little doubt, however, that things will improve in the not too distant future.不过事情在不久的将来会有所改善，这几乎毋庸置疑。We plan to meet again in the not too distant future , ie quite soon.我们打算不久以后再次见面.But, the not - too - distant...
I could hear the sound of a band tuning up.我能听到乐队调音的声音。There's a lot of fine-tuning to be done yet.还需要作出很多微调。Proven troubleshooting and problem solving skills, high tuning skills preferred.有较强的分析及解决问题的能力, 有滤波器调试经验者优...
Below the bridge we could just discern a narrow, weedy ditch.我们仅能依稀辨出桥下一条杂草丛生的窄沟。It is possible to discern a number of different techniques in her work.从她的作品中可以识别出许多不同的创作手法。Some people find it difficult to discern blue f...