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Second,the sterically demanding substituted magnesium alcoholates can be prepared from dialkylmagnesiums R_2Mg and alcohol.The main disadvantage of this synthesis route lies in the fact that relative expensive dialkyl magnesium compounds,such as Et_2Mg for example,have to be used as starting materials.For this problem,a convenient preparation route of pure dialkylmagnesium from a Grignard reagent.

二、烷基镁法：具有空间位阻效应的仲醇镁和叔醇镁可以直接用烷基镁R_2Mg和醇进行反应来制备，这条路线的主要缺点是烷基镁比较昂贵，为了解决这个问题，本文采用格式试剂来制备烷基镁，将制得的烷基镁与叔丁醇反应制得叔丁醇镁。

Loneliness, the common ground for terror, the essence of totalitarian government, and for ideology or logicality, the preparation of its executioners and victims, is closely connected with uprootedness and superfluousness which have been the curse of modern masses, since the beginning of the industrial revolution and have become acute with the rise of imperialism at the end of the last century and the break-down of political institutions and social traditions in our own time.

中译文：孤独是恐怖的共同基础，是极权政府的本质，而对于意识形态和逻辑性（即准备它的杀人者和受害者）来说，它与无根和成为多余的情境紧密相关；自从工业革命开始以来，这已经成为对于现代大众的蔑称；而在19世纪末，随着帝国主义的兴起，它变得更加尖锐；在我们这个时代，它却造成了政治制度和社会传统的崩溃。

Loneliness, the common ground for terror, the essence of totalitarian government, and for ideology or logicality, the preparation of its executioners and victims, is closely connected with uprootedness and superfluousness which have been the curse of modern masses, since the beginning of the industrial revolution and have become acute with the rise of imperialism at the end of the last century and the break-down of political institutions and social traditions in our own time.475

孤独是恐怖的共同基础，是极权政府的本质，而对于意识形态和逻辑性（即准备它的杀人者和受害者）来说，它与无根和成为多余的情境紧密相关；自从工业革命开始以来，这已经成为对于现代大众的蔑称；而在19世纪末，随着帝国主义的兴起，它变得更加尖锐；在我们这个时代，它却造成了政治制度和社会传统的崩溃。

Loneliness, the common ground for terror, the essence of totalitarian government, and for ideology or logicality, the preparation of its executioners and victims, is closely connected with uprootedness and superfluousness which have been the curse of modern masses, since the beginning of the industrial revolution and have become acute with the rise of imperialism at the end of the last century and the break-down of political institutions and social traditions in our own time.475 http://www.aisixiang.com

孤独是恐怖的共同基础，是极权政府的本质，而对于意识形态和逻辑性（即准备它的杀人者和受害者）来说，它与无根和成为多余的情境紧密相关；自从工业革命开始以来，这已经成为对于现代大众的蔑称；而在19世纪末，随着帝国主义的兴起，它变得更加尖锐；在我们这个时代，它却造成了政治制度和社会传统的崩溃。

Objective: To optimize the preparation of Trimeresurus tea extraction process and the physical and chemical methods for clarification of the extract obtained in extraction technology to clarify the optimal conditions for a variety of conditions.

摘 要：目的：优化竹叶青茶制备的提取工艺并用物理及化学方法对提取液进行澄清，得到了提取澄清技术中各种条件的最优条件。

The result of this paper demonstrated that it is feasibility to design a surgical stapler for urethral vesical anastomosis in reconstruction of lower urinary tract, which provided a theoretical basis for the model preparation and industrialization of patent products.

提示设计膀胱尿道吻合器在理论上是可行的，为专利产品的模型制作和产业化奠定了理论基础。

We first found out the preparation of intact budding yeast nuclei suitable for substrates for replication in Xenopus egg extracts.

我们首先摸索出了一个制备适用于爪蟾卵复制底物的完整芽殖酵母细胞核的方法。

As production cost will be one of the main challenges for commercialization of fuel cells, a new approach to MEA production for PEMFC has been considered. Electrodes are produced by a new dry layer preparation method in a suction procedure and co-operated with a particle diffusion design.

薄膜电极组制造成本高昂是燃料电池商品化的一项障碍，本文所提出之MEA新式制作方式采用乾式制程配合粉末吸附与扩散机制将可缩短MEA之制作流程，达到简化制程之主要目的进而降低生产成本。

Including maintenance of general ledger and bank reconciliation· Responsible for preparation of statutory accounts and various reports in accordance with the local statutory requirements and tax regulations· Be responsible for the fixed assets managements· Invoice management· Other admin duties assigned

我们为欲在全球性企业寻求成功职业生涯的员工提供良好的福利待遇、培训和职业发展机会。

Preparation of quasi-interpenetrating network/functionalized gold nanoparticle composite matrix and its performance for DNA sequencingA new matrix additive,PDMA-functionalized gold nanoparticle, was prepared by "grafting-to" approach to avoid GNP aggregation at high concentration of salt in buffer solution,and then incorporated into quasi-IPN composed of LPA(3.3 MDa) and PDMA to form novel polymer/metal composite sieving matrix(quasi-IPN/GNP-PDMA) for DNA sequencing by CE.

准互穿聚合物网络/官能化的金纳米粒子复合介质的制备及其用于DNA测序性能的研究为了解决GNPs在高盐浓度下易附聚的问题，由&grafting-to&法制备了一种新型介质添加剂，即PDMA官能化的GNPs，并将其加入到由LPA(3.3 MDa)和PDMA所组成的quasi-IPN中得到了用于毛细管电泳DNA测序的聚合物/金属复合筛分介质(quasi-IPN/GNP-PDMA)。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。