Based on the reactions , this paper reports research for synthesizing benzaldehyde.简要介绍以此类方法对合成苯甲醛的研究.Natural benzaldehyde is prepared by hydrolysis cassia leaf oil.从桂叶油出发,通过碱性水解制备天然苯甲醛.Pitch resin was synthesized from b...
The density logger consists of a radiation source.密度测井仪包括辐射源.Radiation effects relevant to this formalism are additive.和这套公式有关的辐射效应是可以相加的.The radioactive material is stored in a special radiation-proof container.放射性材料储存在...
中国有世界最古老的树种 -- 水杉.China has the world's most ancient tree species -- metasequoia.采用正交试验方法,确立了徽波法提取水杉黄酮的提取工艺条件.The extraction technology of flavonoid in Metasequoia microwavean orthogonal test was studied.2005年7月25日,...
大西洋上空的低气压通常给英国带来恶劣的天气.A depression over the Atlantic usually brings bad weather in Britain.图3.6.1热带低气压在二零零六年九月十二日至十三日的路径图.Figure 3.6.1 Track of the tropical depression on 12 - 13 September 2006.该低气压预计将于今日某个时候升级到热带风暴的强度.T...
France's Champagne region, for instance, helps give Veuve Clicquot special cachet.例如法国香槟区就给[凯歌皇牌]特别的尊贵象徵.Veuve Clicquot is then carefully shipped around the world to discerning customers.尤乌·克里括香槟然后被小心地运往世界各地,供富于鉴赏力的...
绝经是自然的生理过程, 并非医学疾病.Menopause is a natural biological process, not a medical illness.但绝经后随着雌激素含量的降低, 27HC取而代之的与受体结合.But as estrogen declines after menopause, 27 HC takes over.绝经年龄是评价妇女更年期特征的主要指标.Menopausal age is an index...