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The following exciting results are revealed: 1 When considering the influence of some nonlinear elements such as hard-limit of exciters, the effects of some devices such as Power System Stabilizer and Static Var Compensator which can introduce positive damping in power system, the reasonability of system parameter values in simulation, the SNB surface and HB surface on the boundary of SSSR will turn close to each other and even coalesce together; 2 Under some conditions, coupling between slow exciters and shunt capacitors will bring negative damping in power system dynamics, which increases the possibility of oscillatory instability. So the power system with mass shunt compensators is easily subjected to the oscillatory instability. In recent years, chaotic phenomena of power system have been reported many times. Some simulation studies even found chaos existing inside the power system SSSR. In this dissertation, chaotic phenomena in power systems are thoroughly studied in order to make clear the relation of chaos and SSSR. The following results are derived: 1 Based on Li-Yorke Theorem and their definition on the chaos, the existence of chaos in power system is verified; 2 Three possible routes of causing chaos in power system are found and deeply investigated. They are route of cascading period doubling, route of directly initial energizing and route of torus bifurcation (or quasi-periodicity). The latter two routes are investigated for the first time in power system stability studies; 3 When the stability conditions of chaos are broken, it is found they can lead to voltage collapse, angle divergence, or voltage collapse with angle divergence simultaneously.

针对在电力系统小扰动稳定区域内可能存在混沌吸引域的有关报道，本文深入研究了电力系统混沌现象的出现途径和与系统失稳模式之间的关系：1利用Li-Yorke定理和Li-Yorke的混沌定义，从理论上证明了电力系统混沌现象的存在性；2发现了电力系统中导致混沌出现的三种可能途径：倍周期分岔导致混沌、初始能量直接激发混沌和经由环面分岔导致混沌，并对后两种新发现的途径进行了较为细致的研究；3发现了混沌极限环破裂导致电压崩溃、角度失稳以及电压崩溃和角度失稳同时出现的现象，其中混沌极限环破裂导致系统角度失稳和电压崩溃及角度失稳同时出现的现象均属首次报道；4证明由微分-代数方程描述的系统模型，其小扰动稳定域的边界只包含HB、SNB和SIB三种分岔界面，在SSSR的内部和边界上，均不可能存在会导致混沌的点，从而将混沌现象排除在小扰动稳定域的研究之外，简化了后者的研究工作。

The result indicates that the imbalance of cutter bring the most important influence of cutter's vibration, distance error of teeth impacts cutter's vibration under dynamic cutting force. This method had been applied in the development of high speed face milling cutter.

结果表明：刀具不平衡量引起的离心力对铣刀自激振动影响最大，齿距差对动态切削力作用下的铣刀振动产生重要影响，该方法已应用于高速面铣刀产品研发中。

There, on the soft sand, a few feet away from our elders, we would sprawl all morning, in a petrified paroxysm of desire, and take advantage of every blessed quirk in space and time to touch each other: her hand, half-hidden in the sand, would creep toward me, its slender brown fingers sleepwalking nearer and nearer; then, her opalescent knee would start on a long cautious journey; sometimes a chance rampart built by younger children granted us sufficient concealment to graze each other's salty lips; these incomplete contacts drove our healthy and inexperienced young bodies to such a state of exasperation that not even the cold blue water, under which we still clawed at each other, could bring relief.

在软和的沙滩上，我们整个早晨都平躺在离大人仅有几英尺的地方，尽力压抑涌动的欲望，抓住每一次珍贵的时间和空间的机会来接触对方：她半埋在沙中的手，会慢慢的向我掘进，那棕色的瘦小的手指像梦游一样渐渐的走近；接下来，她乳白色的膝盖会开始一个小心翼翼的漫长的旅行；有时候，一些嬉戏的小孩修筑的沙堡会赐给我们足够掩护以遮住我们交接的咸腥的嘴唇……这些不完整的接触将我们健康且缺乏经验的幼嫩身体带入了邻近爆发的境地，就连掩盖着我们抓紧的双手的寒冷的蓝色海水也无法将其平息。

The shades, those sombre hatchers of primitive Christianity, only awaited an opportunity to bring about an explosion under the Caesars and to inundate the human race with light.

原始基督教义的一种未受重视的孵化设备棗黑暗，它只待时机成熟，便在暴君们的座下爆炸开来，并以光明照耀人类。

To conquer limitations of existing techniques for developing loop invariants, professor Xue Jinyun, who is imbursed under two National Nature Science Foundation of China, systematically research the theory and method of loop invariants and advanced the new definition and developing strategies for loop invariants. Based on above, he presented efficiency method of developing algorithmic program, Partition-and-Recur Approach, and its developing environment which bring into important play in formal method.

为了克服已有循环不变式开发技术存在的局限性，薛锦云教授在两个国家自然科学基金课题&若干新的算法程序设计和证明方法研究&和&实用的软件形式化方法及其开发工具的研究&的资助下，对循环不变式的理论和方法进行了系统的研究，提出了关于循环不变式的新定义和新的开发策略，并在此基础上形成了一种实用的算法程序形式化开发方法及其开发环境，在复杂算法程序及软件形式化开发中发挥了重要作用。

To the south, Israel faces the Islamist Hamas movement, which controls the Gaza Strip and whose charter promises to destroy Israel and bring every inch of Palestine under Islamic rule and law.

在南方，以色列面对的控制加扎斯特里普的伊斯兰教哈马斯运动。

Take the index finger of your right hand and bring it up under your right eye. If they're seated, or lying down on their back, say exactly the same thing.

将你右手的目标指放在你的下方，如果他坐着，或者躺着，也直接说上述指导语。

Pat Oliphant imagines the president going under the plastic surgeon's knife to achieve the look that he believes will bring the waverers back.

在今天的漫画中，漫画家帕特·奥列芬特作了这样的想象：为了获得自认为能将犹豫不决者拉将回来的容貌，布什正在整形外科医生的手术刀下整容。

But any nation that will bring its neck under the yoke of the king of Babylon and serve him, I will leave in its own land, declares Jehovah, to till it and dwell there.

27：11 但那一邦肯把颈项放在巴比伦王的轭下服事他，我必使那邦仍在本地存留，得以耕种居住；这是耶和华说的。

The sones fall into the high-speed turning impellers from the top of the machine.Under the function of high-speed centrifugal force,the stones crushed the others distributed around the impeller in the form of umbrella.After the stones impact each other,the eddying motion is formed between the impeller and main case to bring obout many times mutual impactind,rubbing,and crushing till the granularity required is achieved.

石料由机器上部直落入高速旋转的转盘，在高速离心力的作用下，与另一部分以伞形方式分流在转盘四周的石料产生高速度的撞击与高密度的粉碎，石料在相互打击后，又会在转盘和机壳之间形成涡流运动而造成多次的互相打击、摩擦、粉碎、直至粉碎成所要求的粒度。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。