机理

The potential of the dental crown to the middle point of dental root gradually reduced when the pH value of artificial saliva decreased.So adsorption of the cariogenic bacterium on the dental surface increased,incidence of the caries also possibly increasd.

本研究在人工唾液不同pH值时，通过对牙齿表面电位的测定，来观察牙齿表面电位随着人工唾液pH的变化，情况并探讨二者之间的关系，从而揭示酸的致龋机理，为龋病发病机理的研究提供一些实验数据。

This paper includes several parts: first, some important concepts of the thesis have been defined, a theoretical overview of currency crisis has been finished; then, we have described the history of the international monetary system; later, three chapes have been arranged to discuss the mechanism of currency crisis under fixed and floating and intermediate exchange rate system respectively. The part of the fixed exchange rate system mainly includes the analysis of the collapse of the international gold standard system, the Bretton Woods system and the the European Monetary System; in the part of the floating exchange rate system, the volatility problem under freely floating exchange rate system has been studied; the part of the intermediate exchange rate system mainly includes the analysis of currency crises in regional dollar standard system and the currency board system. And finally, we have analysed the inevitability of the appearance of new type regional monetary cooperation patterns, and how these cooperations avoid currency crises.

本文主要包括这样几部分：首先，对论文中涉及到的重要概念给予界定，并对货币危机理论进行系统梳理；接着，按时间顺序从总体上回忆国际货币制度的历史演进；然后，用三个章节分别研究了固定汇率制度、浮动汇率制度以及中间汇率制度下货币危机的形成机理，其中，固定汇率制度下的货币危机主要包括国际金本位制度和布雷顿森林体系的崩溃，以及欧洲货币体系的瓦解；浮动汇率制度下的货币危机，则重点分析了自由浮动汇率制度下汇率的过度波动问题；中间汇率制度下的货币危机，分别分析了区域美元本位及货币局制度下货币危机的发生机理；最后，分析了目前新型区域货币合作模式出现的必然性，及各模式下如何规避货币危机。

The ciliates were always ideal materials in the studies of the structure and function of cytoskeleton and its cell control and adjustment, for they have many kinds of cytoskeletons with complexity and they could be easily cultured and handled.

由于原生动物纤毛虫具有多种复杂的细胞骨架结构，加之其材料培养和处理的优点，一直被作为研究细胞骨架结构与功能及其细胞调控的理想材料。20世纪80年代初，许多学者应用蛋白银染色方法和超微结构方法，显示了纤毛虫细胞皮层中以纤毛基体作为主成分的骨架结构，探讨了纤毛虫皮层纤毛器的形态、形态发生及其结构形成机理，在国内外原生动物细胞学领域成为主流。20世纪90年代起，先后应用非离子去垢剂处理和扫描电镜相结合的方法、稳定保存微管结构的透射电镜术，微管蛋白的抗体标记及其免疫荧光技术及相关的生化与分子生物学等方法显示纤毛虫的微管胞器及其微管蛋白组分，探索微管胞器的形态、功能及其微管装配机理，积累了较多的资料，取得了重要的进展。

This desiccant has a disadvantage as being agglomeration after regeneration.In addition, mechanism of moisture adsorption of corn hull desiccants. By the phenomena of adsorption and calculative activation energy, the mechanism of moisture adsorption was validated.

另外，本文对玉米渣皮干燥剂的吸附机理进行了探讨，并通过玉米渣皮干燥剂吸水过程中所表现出的性质和吸附活化能的计算结果对吸附机理进行了验证。

Recent research works on one-pot synthesis of dimethyl carbonate from epoxide s,carbon dioxide and methanol were reviewed.

综述了近几年环氧烷烃、二氧化碳和甲醇一步法合成碳酸二甲酯的研究进展，详细阐述了当前所用到的催化剂的结构，性质和催化机理，简单探讨了该合成路线的反应机理，并分析了以后需要深入研究的方向。

The etiologies and some effective or potential therapies and drugs for AD which are already...

本文主要阐述一些人们普遍接受的病变机理，并介绍一些有效或潜在的治疗方案与药物作用机理。

The paper firstly generalizes the style and mode of land use as well as the influencing factor, and then forms the mechanism of fanners land use from micocosmic point of view. It mostly is involved with the object, pattern of decision-making , and the mechanism.

文章首先对农户土地利用的类型、方式及其制约和影响因素进行了全面的总体概括，在微观的层面上构建了农户土地利用的行为机理，主要包括农户土地利用的目标、决策模式、决策机理等方面。

Based on the analysis of scaling and anti scaling mechanism, the feasibility of applying high frequency electro magnetic field in the ash removal system in power station together with other physical anti scaling technologies in water treatment has been discussed.

从结垢机理、防垢机理出发，并结合其他物理防垢技术，通过在某电厂的高频电磁场试验研究，阐明高频电磁场在电厂除灰系统中应用的可行性，同时提出了在应用和研究中需注意的问题和建议。

Based on the testing analysis of microcosmic digital image, there are smaller Fissions, higher density and even distribution under high confining pressure than under low one. Microcosmic damage mechanics of rock cracking under high confining pressure and hydraulic pressure is given. Reliable testing basis is offered to analyze further failure and stability of the noncircular cave surrounding rock under high confining pressure and high hydraulic pressure.

通过微观数字图像试验分析发现，高围压条件下大理岩断口裂纹长度小、密度大、分布相对均匀，给出高水压高围压作用下岩石破裂产生的微观损伤力学机理，为进一步分析高围压高内外水压条件下非圆形洞室围岩失稳破坏机理提供了可靠的试验依据。

The analyses of stochastic force on fluidized bed systems apply the stochastic theory to flowing mechanism and studies of bubble distribution, and redound to open out the inside nonlinear mechanism and characteristic of fluidized beds.

对流化床系统的随机力分析将随机理论的方法运用到流化床流动机理和气泡分布研究中，有助於揭示流化床内部非线性机理和特性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。