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Conservation of mass.conservation of moment muni and conservation of energy are basic regularity obeyed by all movement in nature.For a certain problem in natrue .if we quantify the corresponding conversation law . we can deduce partial differential equation reflecting this problem .and every differential equation reflecting a special physical phenomenon on certain codition.

质量守恒、动量守恒和能量守恒是自然界一切运动所遵循的基本规律，对于自然界的某一特定问题，如果把相应的守恒律数量化，就导出刻划这个问题的微分方程，每一个微分方程都在一定条件下刻划了某一特定的物理现象。

Digital printing, copying machine when using a certain number of years or printing, copying to a certain number of sheets, its image quality will decrease after the use of some components in the limit, there will be deficiencies in image quality.

数码打印、复印一体机当使用一定的年限时或打印、复印到一定张数后，其图像质量都会有所下降，一些部件在使用到极限时，就会出现图像质量的缺陷。

The essence of oligarchical rule is not father-to-son inheritance, but the persistence of a certain world-view and a certain way of life, imposed by the dead upon the living

寡头政体的关键不是父子相传，而是死人加于活人身上的一种世界观，一种生活方式的延续。

Describes the Dodge very abundant dynamic performance with an adjective summary, that is smooth this phrase without a doubt, although lets the person startled colorful lively performance in the slow-speed of revolution territory development, but after on expressway, 2.0 make it the motive to add on Dodge the very abundant component heavy 1,455 kg vehicle to be heavy, still had created certain burden to the vehicles, along with vehicle speed climbing, the acceleration strength which very abundant unfolds becomes slower gradually, but uses frequently in the people 80 to 100 km/h sectors, the acceleration time still held certain level, what but was a pity, when after the engine speed arrives at 4,000 rpm,, the noise which transmits by the engine compartment tends to be obvious, caused the trifle regarding comfortableness to decrease.

用一个形容词概括描述道奇酷博的动力特性，那毫无疑问就是平顺这个字眼虽然在中低转速域展现让人惊艳的轻快表现，但上了快速道路之后，2.0升发动机加上道奇酷博份量不轻的1，455 kg车重，仍然对车辆造成了一定的负担，随着车速的攀升，酷博所展现出的加速力道逐渐趋缓，不过在国人使用较频繁的80至100 km/h区间，加速性仍保有一定水平，但较为可惜的是，当发动机转速来到4，000 rpm后，由发动机室所传来的噪音渐趋明显，对于舒适性造成了些许减损。

Presenting a theorem of one dimensional time multiplying ,also a demonstration to the theorem which says that Any point in 3 dimensional spaces of the universe at an certain universal moment possesses equivalent physical quantities of one dimensional time that is equal to total amounts of one dimensional time of the universe at same universal moment; Any point in 3 dimensional spaces of the universe at an certain universal moment , its possessed physical quantities of one dimensional time has an constant ratio with respect to one dimensional space , which is universally equal to space time impedance.

给出了一维时间增殖定理及其证明。该定理指出：在任意宇宙时刻，宇宙三维空间中任意一点具有的一维时间物理量量值均相等并等于在该宇宙时刻宇宙具有的一维时间物理量总量；在任意宇宙时刻，宇宙三维空间中任意一点的一维时间物理量的一维空间变化率均相等且恒等于时空阻抗。

Secondary onomatopoeia means that certain sounds and sound sequences are associated with certain senses in an expressive relationship.

中象声词是指某些声音和声音的序列与表达的关系在某些感觉有关。

However, the study based on the analysis of open market operation indicates that the relation between open market operation and monetary aggregate is certain, but the certain relation does not exist between open market operation and interest rate, and the uncertain relation between open market operation and interest rate comes from the uncertainty of IS curve's slope.

以公开市场操作为对象，本文研究表明，公开市场操作和货币量之间确实存在确定的关系，而和利率之间的关系是不确定的；导致利率和公开市场操作关系不确定的主要原因是IS曲线的斜率是不确定的。

Moreover, I shall define the legal characters of gangland-involved organization in six respects, hat is, certain open sphere of influence; considerable tight organizing features; certain economic power to seek economic interests and benefits; existing political "umbrella": violence- and threat-featured behavioral characters and severe damages to economic, social and living orders.

笔者从六个方面界定了黑社会性质组织的法律特征，即：有一定公开的势力范围；有比较严密的组织特征；具有一定经济实力，谋求经济利益；具有政治"保护伞"；以暴力、威胁为主的行为特征；对经济、社会生活秩序的严重破坏性。

Dynamic program is to solve much phase the mathematical method of decision-making problem, it can divide the moving process of a certain system for a certain number of level, use principle of optimality to build basic equation, make target function is achieved best, seek an optimum solution.

动态规划是解决多阶段决策问题的数学方法，它可以将某个系统的运行过程分为若干个阶段，利用最优化原理建立基本方程，使目标函数达到最优，求出最优解。

The order of an element is a significant concept in group. There are certain internal connections between the order of an element and the order of a group, the order of an element and the type of group, certain order of an element in groups too.

而元的阶又是群的一个重要概念，元的阶和群的阶有着内在的联系；元的阶和群的类型有着内在的联系；群中某些元的阶也有着内在的联系。

The role of the environment is very important.

的作用，环境是非常重要的。

At that time, the High Court of England and Wales Court of Queen's Bench president of William Murray, Lord Mansfield in June 22, 1772 ruling:"No matter then there is the inconvenience, but there must be a decision, I can not say that this case under the law in England are permitted or authorized; are so black should be released."

当时的英格兰及威尔士高等法院王座法庭院长William Murray， Lord Mansfield于1772年6月22日宣判：「无论有那麽不便，但总要有个决定，我不能说这件案在英格兰法律之下是准许或认可；所以黑人是应该被释放。