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Starting from 3, 5-dihydroxybenzoic acid, a total of 16 kinds of salicylicaldehyde derivatives have been synthesized by the esterification, substitution, reduction, formylation, condensation, brominate, functional group protection and deprotection reactions, of which 11 have not been reported yet. Enatiomerically pure 2-amino-2'-hydroxy-1, 1'-binaphthyl has been easily obtained from its racemic mixture by the eantioselective formation of inclusion crystals with N-benzylcinchoninium chloride.

树枝状大分子希夫碱三齿手性配体的设计与合成从3,5-二羟基苯甲酸出发,通过酯化、取代、还原、甲酰化、缩合、官能团的保护与去保护等反应合成了四个系列16种水杨醛衍生物,其中11中是未见文献报道的新化合物。

If, however, it had been treated as an interference, and if you had chosen to shift your attention from Centered attentiveness to external attentiveness, with a certain degree of botheration associated with it, the event would have been prolonged and Christopher would not have felt you had been present with and for him.

假如,你先前视它为干扰,表示你选择将你的注意力由「皈心状态」转移到外界去了,你若对此感到心烦的话,这事件就会搞得没完没了,克里斯多夫也不会有你与他一起且为他而在的感觉。

ConclusionNew criteria of plasma lipid values in children in Beijing are established by our investigation in 971 healthy school students.Age and sex have been analyzed.Borderline and high of TC and LDLC levels have been settled.Cutoff of hypertriglyceridemia and hypohigh density lipoprotein cholesterolemia have also been established.

结论通过对971名北京市中小学生的血脂调查,建立了北京地区不同年龄性别儿童青少年的血脂正常值,确立了临界高胆固醇和高胆固醇血症浓度、高甘油三酯血症浓度和低高密度脂蛋白浓度。

In the part of software, the introduction has been included the design and flow of not only main module but also subordinate module, infrared remote controller. Some classic programs has been analyzed. Coinstantaneous communication has been realized between main module and subordinate module based on the study for infrared communication protocol.

在系统软件设计部分,详细叙述了:主机系统软件设计及流程;从机系统软件及流程;红外遥控发射器软件设计及流程,并对典型程序进行了分析。

Now the developing countries has been HIV, TB and has been badly battered and malaria made,"and prevent influenza in these countries is no doubt tired of the health system has been another major challenge", Coker fear that developing countries

现在,发展中国家已经感染艾滋病毒,结核和已经焦头烂额和疟疾的进展,&和预防流感在这些国家无疑是厌倦了卫生系统是另一项重大挑战&,科克尔担心发展中国家

In this paper, the principle of sell-pumped conjugator has been introduced and some parameters which effect the conjugate efficiency have been discussed, the experiment scheme using self-pumped eonjugater to improve the output quality of diode laser array has been discussed.

通过介绍自泵浦相位共轭镜的工作原理,针对影响共轭效率的参数进行了讨论,列举了采用自泵浦相位共轭镜改善激光列阵光束输出质量的多种常用实验方案,并总结了这些方案的优缺点。

Bessie had been down into the kitchen, and she brought up with her a tart on a certain brightly painted china plate, whose bird of paradise, nestling in a wreath of convolvuli and rosebuds, had been wont to stir in me a most enthusiastic sense of admiration; and which plate I had often petitioned to be allowed to take in my hand in order to examine it more closely, but had always hitherto been deemed unworthy of such a privilege.

贝茜下楼去了一趟厨房,端上来一个小烘饼,放在一个图案鲜艳的瓷盘里,图案上画的是一只极乐鸟,偎依在一圈旋花和玫瑰花苞上。这幅画曾激起我热切的羡慕之情。

Background: Numerous techniques for reconstruction of the coracoclavicular ligaments have been developed to treat acromioclavicular joint separations. A new, stronger method to reconstruct the coracoclavicular ligaments using semitendinosus tendon allografts has been previously described. No outcome studies have been published on this new procedure.

背景:目前重建喙锁韧带治疗肩锁关节分离的技术层出不穷,一种新的,坚固的通过同种异体半腱肌移植重建喙锁韧带技术曾经被描述过,然而对这一新技术的临床效果却没有文献公开报道。

So far no reports have been shown about the browsing and gelation mechanism of sebastan plum cordia during processed, but few studies had been undertaken on the analysis of sebastan plum cordia's composition. In this work, in order to clear problems caused from during processing, browsing and gelation had been investigated to raise the quality of products and its operational efficiency for to develop a new products.

对於破布子采收后加工处理过程中之相关变化(特别是破布子之色变与凝胶机制)等目前尚无人作出完整之相关研究,仅有少部分关於破布子之基本组成分分析,本研究系在探讨上述之各项变化,以期能够解决目前在采收后处理及加工制造上所面临之各种相关问题,进而提高产品品质及作业效率,并开发出各种新产品。

Template-confined growth is a very powerful method for obtaining aligned 1D nanomaterials with adjustable diameter, length and morphology. Porous anodic aluminum oxide templates with different channel structures have been synthesized in our lab, with which the aligned CNT arrays, Y-branching and novel dendriform CNTs have been obtained. Based on the structural characterization of the products, a space-limited and self-catalytic growth mechanism has been proposed accordingly. Roughly speaking, the catalyst particles at the bottom of template channels initiate the nucleation of carbon species, which acts as the seed for subsequent CNT growth.

本文采用近年发展起来的模板控制生长法,以多孔氧化铝模板控制CVD生长的方法调控了碳纳米管有序阵列、γ-分叉及树枝状分叉结构,在对产物进行详尽结构表征和分析的基础上阐述了氧化铝模板控制生长碳纳米管的生长机制:孔道内催化剂仅在生长初始阶段催化碳物种的成核,起&种子&作用,随后模板孔道自身的催化及限域作用使碳纳米管紧贴着孔道内壁生长。

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相关中文对照歌词
The Life That Could Have Been
I Know I've Been Changed
Never Been A Greater Love
I've Been Waiting For You
You've Been A Friend To Me
Have You Ever Been Lonely (Have You Ever Been Blue)
Have You Ever Been Lonely (Have You Ever Been Blue)
Have You Ever Been Lonely (Have You Ever Been Blue)
Should've Been Could've Been
I've Been Up, I've Been Down
推荐网络例句

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。