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Therefore,it is necessary to research diffusion equation for suspended sediment because it describes the sediment move process in the water body.The equation is a various coefficients second-order linear partial differential equa-tion,such equation under complex boundary condition is very difficult to get its analytical solution,while its numerical solution relative analytical solution is more easier and has the obvious superiority:simple,the computation convenience.but to get a kind of difference format which is good accuracy and stability is not easy.

泥沙扩散方程实际上是一个变系数的二阶线性偏微分方程，这样的方程在各种复杂边界条件下求解是十分困难的，求它的解析解在数学上存在着难以克服的障碍，无法求出其精确解，因此常用数值方法求它的近似解，相比较而言，数值方法有着明显的优势：即简单灵活、计算方便快捷，但要寻找一种精度高、稳定性好、计算方便的差分格式也并非易事。

The difficulties that the beginning physics teachers meet in the process of their professional growth mainly includes: firstly, pedagogically speaking, how to accomplish the transformation from textbook knowledge to practical operation, from indirect experience to direct experience; how to get practiced in the course-book and acquainted with the students, how to design the teaching plan and the classroom teaching, how to induce students to get engaged in scientific probe, to develop effectively the physics curriculum resource and to give vivid and examples.

初任物理教师在专业成长过程中所遇到的困难主要有：在教学方面，如何实现从书本知识到实际操作、从间接经验到直接经验的转化，如何熟悉教材、熟悉学生，怎样进行教学设计、课堂教学，如何引导学生进行科学探究、有效开发物理课程资源、举出形象直观生动的实例等；在班级管理方面，如何有效经营班级、评价学生等；在人际交往方面，如何与学校相关职能部门疏通好关系、如何与学校相关人员处好关系、如何与学生家长进行有效沟通交流等。

All we know is that Percy had to get top grade N.E.W.Ts to get into the ministry.

所有我们知道的，就是珀西为了进入魔法部必须在N.E.W.T考试中得到最高级别。

Would be expected to perform experiments to get to root cause when production issues and get solutions.

当有生产问题时，要能做实验，找出根本原因并提供解决方案

Eg. In order to get a job, he has to get a PhD.

你要做的就是遵守这些规则。

Well, if you wanna get philosophical, I'll get philosophical with you.

好吧，如果你想一本正经我就对你一本正经

Chapter one is "Introduction". On the basis of summarizing the history of the study of the pictophonetic characters, we suppose some theoretical principle, such as the principle of the correspondence between the form and the meaning of the individual graph of Chinese characters, the principle of the total graphs of Chinese characters being a character-formation system, and the principle of the optimum development of the character -formation system in the history, and som analytic methods, such as the methods of structrue-function analysis, form-position analysis and meaning factor analysis, in the study of the pictophonetic characters. Chapter two is titled"General knwledge of the pictophonetic character." We discuss their origins, nature and some standards of distingnishing them, introduce the knowledge about the editions of SHUO WEN JIE ZI, analyse the functions of the modules of pictophonetic characters in detail, discuss concretely the function of phonetic graphs showing origins and pronunciations, the function of meaning graphs showing meanings and analogies, and the function of distinguishment when the two kinds of graphs are conbined. Chapter three is"The system of meaning graphs of Xiao Zhuan system."After we describe the structure of the meaning graph system, the relations between meaning graphs, the distributions of the function of meaning graphs showing meanings, and the frequency of all this kind of graphs, we get a table of all meaning graphs, a table of the frequency. Chapter four is"The system of phonetic graphs of Xiao Zhuan system."We describe the structure of the phonetic graph system, the relations between phonetic graphs, and between their function showing origins and their function showing pronunciations, and their frequency, then we get ageneral table of phonetic graphs and table of their frequency. Chapter five is "conclusion". We think that systematical methodology is useful in describing and analysing the formation system of Chinese characters. The methodology is adaptable in describing the formation system of modern Chinese characters as well as the historical character systems, adaptable in describing horizontally as well as comparing vertically. Only when we finish the systematical vertical compare on the base of systematical horizontal decription, could we know the true history of the system of Chinese characters, recover the rule of the system's development, and supply the theoretical supports for the scientifical arrangement of modern Chinese characters.

第一部分—绪论，在总结形声字研究历史状况的基础上，提出了研究形声系统的理论原则和分析方法，即汉字个体字符形义统一的思想，汉字字符集合构形系统的思想，汉字构形系统历史演变系统优化的思想等三项理论原则和结构功能分析法，形位分析法，义素分析法等三种分析方法，还扼要地介绍了具体的工作程序和论文的主要内容；第二部分—形声字概述，论述了形声字的来源、性质和鉴别标准，介绍了对《说文解字》正篆形声字说解中的传抄讹误，版本异文，说解错误校勘和考证的经过，详细分析了形声字构件的功能，具体讨论了声符的示源功能与示音功能，义符的示意功能与类化功能以及声符与义符组合中的相互区别功能；第三部分—小篆字系的义符系统，从义符系统的构成、义符间的相互关系，义符示意功能的分布及义符的构字频度等不同侧面，对义符系统进行了全面的描写，产生了义符总表、义符间意义关系总表和义符构字频度总表；第四部分—小篆字系形声字的声符系统，从声符系统的构成、声符间的相互关系，声符的示源功能与示音功能的关系以及声符的构字频度等不同侧面，对声符系统进行了全面描写，产生了声符总表和声符构字频度总表；第五部分—结束语，在全面测查小篆字系形声字的基础上，对研究汉字的方法和现代汉字发展方向的问题提出了一些看法，认为系统论的方法是描写和分析汉字构形系统行之有效的方法，系统论方法，不仅适用于历史上文字系统的描写，也适用于现代汉字构形系统的描写，不仅适用了断代描写，也适用于历史比较，只有在对汉字断代系统描写的基础上进行系统的历史比较，才能认清汉字系统历史演变的真相，揭示汉字系统发展的客观规律，为科学地整理现代汉字提供理论上的依据。

I get nervous before big parties and then I get pimples.

我在大型的聚会中变得很紧张，然后得丘疹。

At last of the paper, it's studied the relationship between the resistance of the pins of the pincushion 2D PSD and Gear theorem, and find the way to get the boundary resistance and square resistance of sensitive area from the resistance of the pins which can get the position nonlinearity rapidly.

最后，研究了枕型二维PSD的极间电阻与Gear定理之间的关系，可由具体器件的极间电阻确定其单位长度的边界电阻与光敏区方块电阻，从而可以用Gear定理来判别器件的位置线性度，克服了试片法以一概全的缺点。

Snap to it, dont play hard to get with a man who is hard to get.

干脆点，别和那么抢手的男人玩矜持了。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。