合成地

The asymmetric aldol reaction is one of the most important methods of forming carbon-carbon bonds.

不对称羟醛缩合反应是有机合成中立体选择性地形成碳碳键的最重要方法之一。

In addition, access control policies of aggregated resources can be formulated as expressions of the algebra. Several algebraic properties of policy expressions are discussed. It shows that the algebraic properties of policy expressions can be used to verify whether policy composition results meet the protection needs of each party.

用代数表达式形式化地描述聚合资源的访问控制策略，讨论了策略表达式的若干代数性质，说明可借助策略表达式的代数性质去验证策略合成结果是否符合各方对聚合资源的保护性需求。

A C++ program is developed for composing the stiffness matrix of the temperature field, saving it in changing bandwidth method and calculating the linear algebraic function group through using the Gauss eliminating method. A module for drawing the color fringe of tire temperature field is created, which makes the result more visual. Taking the 9.00-20 cross-ply tire on CA1092 as an example, the finite element numerical simulation analysis of automobile tire 2-D steady temperature field is completed. Through comparing the result with the analysis data by ANSYS, this software is proved to be capable of the modeling, calculating and post-processing of FEA of automobile tire 2-D steady temperature field.

采用C++语言完成了温度刚度矩阵的总体合成及其一维变带宽存贮，以及线性代数方程组高斯消去法求解等工作，采用C++语言实现了汽车轮胎二维稳态温度场云纹图的绘制，使得计算结果更加直观，也更能形象地显示汽车轮胎二维稳态温度场的分布状况，以CA1092（原CA142）五吨载货汽车用9.00-20尼龙斜交胎为例，进行了汽车轮胎二维稳态温度场有限元数值仿真分析，通过与ANSYS分析结果进行比较，说明所开发的有限元建模、求解以及后处理软件能够用于汽车轮胎二维稳态温度场有限元分析。

Successfully synthesized 〓 and 〓 at ambient temperature and pressure.

成功地在常温常压条件下合成了〓和〓。

During the study, we improved the condensation condition of the carboxylic acid and the amine, which increased the overall yield by 9 times.

我们从哌嗪出发经取代、还原、烷基化、酰化、还原和磺酰化，共经十三步反应完成地拉韦定的全合成。

Experiments show that our method can be easily manipulated and generalized to multiple fields and successfully synthesize the anile facial images at different ages for various kinds of people realistically.

本方法操作简便，能较逼真地合成不同种类的人脸在不同年龄段的衰老图像，并能方便的推广到诸多应用领域。

Recently, we have detailed a new series of furan-containing teraryl cyclophene derivatives 40a-f and 67. And two keys to syntheses were one-pot furan annulation and the McMurry reaction.

过去我们已成功地利用呋喃成环反应，与McMurry反应合成到一系列的含呋喃之[n.2]环芃烯40a-f与环芃双烯67。

Objective: Augmenter of liver regeneration cloned from liver of weaning rat is a novel hepatic stimulator. It was reported that ALR mRNA expression was correlated with DNA synthesis of hepatocytes after partial hepatectomy, and could significantly promote the survial rate of intoxicated hepatitis rats.

目的：肝再生增强因子是从新生大鼠肝组织中克隆到的一种肝增殖刺激因子，其特异mRNA的表达与大鼠肝部分切除后肝细胞DNA合成密切相关，是一种特殊的促肝细胞分裂原，能特异地刺激肝细胞增殖，是肝再生的重要调控因子，能提高中毒性肝损伤动物的存活率，在肝损伤修复过程中发挥作用。

In the wild type strain, the extra AveR can improve avermectin production in some degree.

而在野生型菌株中，额外的AveR蛋白能适量地提高阿维菌素的合成。

Isopropyl ether is an important intermediate for composing organism andindustrial solvent. It is widely used in medicine, baccy, chemical industrialcombination, environment protection and so on.

异丙醚，又称二异丙基醚、异丙基醚，是一种重要的有机原料和工业溶剂，广泛地应用于医药、烟草、化工合成、环保等领域。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失