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...
The valuations reflect prices at 1 April 1991.这些估值反映了1991年4月1日的价格水平。The surveyors arrived at widely different valuations.鉴定人作出了十分不同的估价.When the crisis eases and confidence returns, valuations are bound to recover.当危机缓解、信...
The contest was as much about personalities as it was about politics.竞赛比手段策略，也比个性。She is one of the wealthiest, most ubiquitous media personalities around.她是目前最富有、最受媒体追捧的人物之一。There seemed to be a degree of personalities ...