冠

In this paper, a series of 4,5-dithiacrown ether annulated 1,3-dithiole-2-thiones 8a~8d were prepared via condensing 4,5-bis-1,3-dithiole-2-thione (7) with 1,ω-dimercapto polyglycol derivatives in high dilution. The obvious template effect was found during the synthesis of 8c-8d.

在高度稀释条件下，经4，5-二溴甲基-1，3-二硫杂环戊烯-2-硫酮(7)和多缩乙二醇的1，ω-二巰基衍生物的缩合反应，方便地合成了4，5-位带二硫杂冠醚残基的2-硫代-1，3-二硫杂环戊烯的衍生物8a~8d，中间体硫杂冠醚8c~8d的合成中有明显的&模板效应&。

Objective: To study the clinical effects of prosthesis in immediatd implant at singe anodontia incisor compared with traditional temporary resin veneer crown.

目的 ：对比分析单个前牙种植体的传统临时冠修复和即刻烤瓷冠修复的临床效果。

Coronary heart disease, also called coronary artery disease and atherosclerotic heart disease, is the end result of the accumulation of atheromatous plaques within the walls of the arteries that supply the myocardium.

冠心病，也被称为冠动脉疾病和心脏冠动脉硬化疾病，主要原因是供给心肌动脉的血管壁上粉瘤的积聚。

Results: Most of ligaments of the occipito-atlanto-axial joints can be identified on sagittal planes, however, the transverse atlantal ligament on axial plane, the alar ligament on oblique coronal and axial plane, can be clearly demonstrated.

结果：寰椎横韧带在横断位和矢状位，翼状韧带在斜冠状位和矢状位，齿突尖韧带在矢状位和斜冠状位能清楚观察各韧带的形态和毗邻关系。

In the canine heart, coronary sinus musculature is continuous with right atrial myocardium at ostium and its connection branch inserts into left atrail myocardium distally, which forms a predominant conduction pathway between two atria in inferior atrial area.

大体心脏电生理证实，冠状窦内存在一条较为稳定的左右心房间电传导通路，该通路一端连接左房后壁，一端在冠状窦口与右房心肌相连。

The welding distortions of the diaphragm with coroneted blades in steam turbine have been studied with model and production experiments in this thesis. It is a main purpose to find out the rule of welding distortion of the diaphragm in radial, circumferential and axal direction.

为了掌握蒸汽轮机自带冠靜叶隔板焊接产生的直径变形、半径变形、节圆收缩率和倾斜变形的基本规律、提出减小和调整焊接变形的合理工艺措施，本文通过基于正交设计的模型试验和现场监测对自带冠靜叶隔板的焊接变形进行了研究。

In Shandong province,the solar energy casted on inside floor,backwall,back slope and sidewalls are about 65%,20%,10%,and 2～5%,respectively,when no plant in the optimized OSPG.

对山东地区的优化一面坡温室而言，在12月21日，室内无作物时，室内地表、后墙、后坡和东西侧墙上获得的太阳能分别占进入室内总太阳能的65%、20%、10%和2%~5%左右；当室内有充分发展的番茄冠层时，室内主体水平面和后墙上获得的太阳能有所降低，冠层南立面上获得10%~20%的太阳能。

Benzenoid system and coronoid system s are the natural representations of the skeletons of molecules of benzenoid hydrocarbons and coronoid hydrocarbons in the field of organic chemistry.

六角系统和冠状系统分别是有机化学领域中的苯碳氢化合物和冠状碳氢化合物的分子结构的自然体现。

Three kinds of optically active pnthalocyanine derivatives modified with chiral 2'-methyoxy-1,1'-binaphthyl; chiral binathyl crown ether; chiral 6,6'-didodecyl- 1,1'-binaphthyl crown ether, have been synthesized and characterized, respectively.

本论文以手性联萘、手性联萘冠醚、冠醚等功能性基团为化学修饰基元，分别合成了三类光学活性酞菁衍生物和两类共轭聚合物，对它们的组装行为以及某些光、电功能性进行了研究。

According to components of Alfalfa canopy,it calculates the absorbing radiation proportion f of plant canopy,concludes that there are a good linear relationship between f and leaf area index from branchy term to maturity,and sets up the model of dry matter production.

根据冠层中各分量计算作物冠层吸收的辐射比例f，得出紫花苜蓿从抽苔分枝期到成熟期和叶面积指数之间有很好的线性关系，并建立干物质生产模型。

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