Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation, hydrogenation, cyclization with an overall yield of 8.05 %. 以苯甲酰氯为原料,经酰化, 还原, 环合等反应合成左旋西替利嗪盐酸盐,反应总收率为8.05%.
Lignin of rice husk high boiling point solvent ( HBS ) digesting process with aqueous solvent of ethanediol.以乙二醇水溶液为溶剂,稻壳为原料制备木质素.Optimization of production can be realized by using the improved ethanediol solvent extrac...
Snow Puppies is a ski school for 3 to 6-year-olds.“雪狗之家”是一所针对3至6岁儿童的滑雪学校。There are countless small ski areas dotted about the province.该省内遍布着许多小型滑雪场。The ski school coaches beginners, intermediates, and advanced skiers.滑雪...
企业经营理念:我们的发展源自不懈的追求和不断的创新.Our development is originated from untiring pursuit and unceasing innovation.他作为同声传译译员的工作要求持续不懈的高度思想集中能力.His work as a simultaneous interpreter requires strong powers of persistent concentration...
Fearful he might accidentally injure a resident , the supervisor decreed banishment.中心负责人担心它会意外伤着住宿的老人, 决定禁止它出入.He was sent into banishment.他被流放....banishment to 'Devil's Island'.流放到“魔鬼岛”Her desire for res...
英语规定形容词通常放在其修饰的名词前：我们说agoodcry，不说acrygood。It is a rule of English that adjectives generally precede the noun they modify: we say "a good cry", not "a cry good".他看到这副加意修饰的外表就会感到身心愉快.The carefully cultivated appearance wou...