综述

This paper summarizes the progress of fish androgenesis comprehensively in the world.

本文全面综述了国内外鱼类雄核发育研究的进展状况。

The yield, quality, resistance and chromosome characteristics of the hybrids were analyzed, and the improvement of the grasses using gene introgression, androgenesis and genetic modification methods was introduced. The latest advance in GISH, genetic map construction and QTL of Festulolium hybrids were described here.

本文总结了黑麦草羊茅杂种高产、优质、抗性强的优势；分析了杂种染色体配型特点；重点介绍了通过基因渗入、雄核发育和转基因手段改良牧草的方法；对黑麦草羊茅杂种基因组原位杂交、分子标记和遗传图谱建立、数量性状位点分析等分子遗传学的最新研究进展进行了综述。

This paper reviewed the mechanism for the failure of spinal anesthesia and corresponding prevention and treatment.

本文对脊髓麻醉失败的机制及相应的预防和处理予以综述。

This article reviews progress of angiotensin Ⅱin cardiovascular system.

本文就血管紧张素Ⅱ受体在心血管系统中的研究进展予以综述。

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。

In this review, the application of anion exchange chromatography to pharmaceutical plasmid analysis was reviewed.

本文对阴离子交换色谱在药用质粒分析方面的应用与研究进展进行综述。

The status and progress of the anode materials for SOFC are reviewed in this paper.

本文综述了固体氧化物燃料电池阳极材料的研究现状和进展。

Vinpocetine is effective in curing cerebrovascular diseases, which can selectively improve the circulation of brain, promote energy metabolism, regulate the system function of neurotransmitter, protect brain from suffering from damage due to ischemia and anoxemia in many ways, be used in treatment of insufficiency in blood - supply, stroke and symptoms related to aging, and have special effect on recognition and memory.

长春西汀治疗脑血管病的有效药物，它能够选择性地改善大脑的血液循环，促进大脑的能量代谢，调节神经递质系统功能，多方面保护大脑免受缺血缺氧性损害，特别适用于防治脑供血不足、中风以及与衰老有关的症状，并对认知和记忆有特别的效果，目前临床应用非常广泛，现将长春西汀的药理作用及临床应用综述如下。

OBJECTIVE: To review structure of anterior cruciate ligament and graft selection.

目的：就前交叉韧带的结构，移植物的选择问题进行综述。

The technical development of separation and refinement anthracene,phenanthrene and carbazole from crud anthracene was summarized in this paper.

综述了从粗蒽中分离和精制蒽、菲、咔唑的技术进展，介绍了物理分离法、化学分离法和复合法，并对各种方法进行了评述。

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