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The four great Siberian rivers are the Ob (3300 miles, with the Irtysh as main tributary), the Yenisey (2550 miles, with the Angara as its main tributary), the Lena (2720 miles) and the Amur (Heilongjiang, 2740 miles) whch is the boundary river between Russia and China.

西伯利亚地区的河流都向北流入北冰洋，主要有鄂毕河（3650英里）、叶尼塞河（3487英里）、勒拿河（4400英里）和俄罗斯与中国的界河阿穆尔河（黑龙江，4350英里）。

The four great Siberian rivers are the Ob (3300 miles, with the Irtysh as main tributary), the Yenisey 2550 miles, with the Angara as its main tributary

北部的北德维纳河向北流经744英里注入白海，全年封冻期竟长达190天。

Research shows that the main factors influencing forging penetration efficiency are reduction in pass and the dip angle of the hammer, and the main factors influencing forged piece surface quality are axle feeding speed and rotation angle.

研究表明：影响锻透性的主要因素为道次压入量和锤头倾角；影响锻件表面质量的主要因素为轴向送进速度和旋转角度。

In this thesis,based on the DFT+NEGF first-principles method,we construct a lead-molecule-lead sandwich system with single benzene-based molecule to investigate the relationship between the structure and properties of the molecular devices and the factors that influence properties of the molecular devices.Our computational investigations on these molecular devices are primarily concentrated on the effect of contact geometry between molecules and electrodes,the effect of side groups,the effect of different torsion angle between two phenyl rings and the effect of external electric field.This thesis consists of five chapters:In Chapter one,we mainly introduce the research background and development of the molecular electronics,including the experimental fabrication of molecular electronic components and theoretical simulation methods.Afterwards we discuss the questions that need to be solved in this area.Finally,the main contents of this thesis are listed.In Chapter two,we introduce the theoretical methods used in this thesis, including the main first-principles calculation methods,i.e.,the Density-Functionmethod and nonequilibrium Green\'s function.

本论文拟采用密度泛函理论和非平衡格林函数相结合的第一性原理计算方法，选取苯基小分子作为研究对象，构建了金属电极/有机小分子/金属电极三明治结构体系，系统地研究了苯基分子器件结构的改变与分子电输运性质之间的关系以及影响分子器件电输运性质的相关因素，其中重点研究了分子与电极间可能的接触结构改变、官能团、分子间的扭转角以及外电场对苯基分子电输运性质的影响，本论文主要包括以下五个章节的内容：第一章为综述部分，主要介绍了分子电子学产生的背景、分子器件的研究意义、当前研究分子器件的实验和主要理论方法，以及目前在研究分子器件中存在的一些问题，最后给出了本论文的主要研究内容和技术路线。

At last, by comparing difference of the dissociation energy of anisole and its main fragment ions of the two channels, the theoretical results further demonstrate, in the experiment, that the main dissociation channel of anisole molecular will be formed.

比较两条通道的碎片离子能量的变化，理论验证了实验中苯甲醚分子主要解离通道的合理性。

It points out that it is no more application of the basic solution of elastic problems in the misalignment of material main axis and coordinate axis to orthogonal anisotropic body and puts forward the coordinate translation methods to solve the problems of the misalignment of material main axis and coordinate axis by using Boundary Element Method to solve the problem.

指出了对于正交各向异性体，当材料主轴与坐标轴不重合时，关于弹性问题的基本解不再适用，为了解决这一问题，特提出坐标转换的方法，以求应用边界元法解决材料主轴与坐标轴不一致的问题。

The main ingredient of the framework is a service composition and brokering system architecture, which consists of four main components: the Service Collector/Annotator, the Service Composer, the Inference Engine, and the Execution Engine.

这个架构包含了四个主要的元件：服务搜集与注解者、服务组装者、推论引擎、与执行引擎。

Contrast enhancement was substantially een across all three areas of interest, Wilke said. Anoa analysis of the 11 studies showed no significant difference (p = 0.014) in the aerage Hounsfield unit alue of the main pulmonary artery (380 HU), left pulmonary artery (382 HU), right pulmonary artery (381 HU), distal pulmonary arteries (354 HU), proximal left main artery (410 HU), and the proximal right coronary artery (382 HU).

造影增强大体上正好可以到达三个需要注意的部位，Wilke说。11项研究的方差分析(p = 0.014)显示肺动脉主干（380 HU）的平均Hounsfield单位值没有明显不同。

Want to solve this one problem effectively, must be known afresh and limit the part fixed position between capital anthropomorphize main body and labor anthropomorphize main body and its correlation clearly.

要有效解决这一问题，就必须重新认识和明确界定资本人格化主体与劳动人格化主体之间的角色定位及其相互关系。

Can you just cancel my main dish, and I'll just have the appetizer as the main?

能把我的主菜取消了吗？我拿开胃菜作主菜好了。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。