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As we know, the algebraic sum of Hammett constants for thesubstituted donor and acceptor groups can be used to characterize the asymmetryin simple π-organic systems, to correlate the variation of NLO properties.

推拉多烯对取代基比较敏感，易于观察到结构上的变化，是一种很好的研究对象，对推拉多烯的量化计算研究可以给我们提供分子结构和非线性光学等性能之间的关系。

SmartForm class -- routines for aligning - This class includes a number of simple to use methods to help your forms look more professional, including functions to center multiple controls on a form, and align controls left, bottom, top, or right.

这个类包括了很多易于使用的方法，可使你的窗体看起来更加专业，包括了这些功能，将多个控件在一个窗体上置中，左对齐控件，或者底部对齐，顶部对齐，右对齐等等。

To achieve this purpose, the authors have investigated the current technological conditions in delead and dearsenic processing and made detailed analysis of alkalescency solution laden with arsenic and lead content as well as the influential factors involved.

实验结果表明，经脱砷和脱铅后，Sb以锑精矿形式产出，可作为炼锑的原料；Pb以 Pb Cl2 或铅渣形式、Sn以锡渣形式产出，其品位较高，可作 Pb或 Sn冶金的原料；该工艺具有化工试剂消耗少、综合利用率高、污染小、易于实现大规模工业化等优

In this study enamine was used as the reactive intermediate for alkylation of cyclohexanone alkylate,to provide a new route to synthesize the perfume-α-tert-butylcyclohexanone after overcoming many disadvantages of the traditional technical route,such as the complicated of reaction steps,the expensive reagents adopted,the high demand for the equipment used,and the low yield of product.

利用烯胺作为环己酮烷基化的活性中间体，为香料α-叔丁基环己酮的合成提供了一条新的途径，克服了传统工艺反应步骤烦琐，试剂昂贵，设备要求较高，产率不高等缺点，易于工业化生产。

Developed for the inexperienced first-time builder and demanding pilot, the STOL CH 801 is designed to be easy to build and to maximize flight performance and efficiency, using simple all-metal semi-monocoque construction - a system in use for 25 years in Zenair designs.

开发经验的第一时间，建设者和要求的试点， stol的CH 801 ，是设计为易于建设，并最大限度地飞行性能和效率，使用简单的全金属半的单体建筑-一个制度，使用了长达2 5年的在z enair设计。

You can make them more memorable and/or easier to pronounce by using alliteration.

你可以使它们更难忘和/或易于发音用韵。

Its isotopes, all radioactive, are highly toxic radiological poisons because they give off alpha particle s and are specifically absorbed by bone marrow.

它的所有同位素都是放射性的，因其放出的α粒子易于被骨髓吸收而具有高度的放射性毒性。尽管具有潜在的致命性，它的毒性通常是被夸大了的。

This paper will analysis and research the webpage with its layout and methods, the visual elements and design principles, web standards, the traditional form layout and DIV+CSS layout and so on, in order to find out those criteria which are followed by a good web page on the aspects of design of layout and visual elements. This paper can give people some references when they are doing some design in the future, at the same time, explores new technology of the web page layout, to make the web page layout simple, convenient, easy to operate, increase the readability and alterability of the code, to reduce the redundancy of code program, to increase efficiency of the persons who are producing the web.

本论文将就网页的布局及方法、网页视觉构成要素及设计原则、Web标准、传统的表格布局及DIV+CSS布局等方面进行分析与研究，从而寻找网页布局、视觉构成要素设计等方面所遵循的一些准则，给今后人们在进行网页设计时以一定参考的同时，探究网页布局的新技术，使网页的布局简单、方便、易于操作、增加代码的可读性和可改性，降低程序代码的冗余性，提高网页制作人员的工作效率。

Of children in a warm atmosphere is easy for people in distress sympathy and help to show more altruistic behavior.

处于温暖氛围中的儿童易于对处于困境中的人表示同情和提供帮助，表现出更多的利他行为。

One surprise was that players put themselves into risky situations more often than epidemiologists allow for in their models. An unexpectedly large fraction of players acted altruistically to protect their weaker friends. On the other hand, a significant number seemed intent on infecting as many other characters as possible—behaviour reminiscent of a small minority of people with AIDS.

一个惊奇的发现是，玩家比流行病学家的模型更易于将自身置于危险境地，在保护弱者朋友时表现出利他行为的玩家异乎寻常的多，另一方面，有相当数量的玩家似乎在尽心竭力地感染尽可能多的其它游戏人物——这使我们联想到少量艾滋病人的行为。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了