The nature of language A definition: Language is human speech; the ability to communicate by this means; a system of vocal sounds and combinations of such sounds to which meaning is attributed, used for the expression or communication of thoughts and feelings; the written representation of such a system. (Webster's New World Dictionary)

Operations used for the treatment of wastewater in which change is brought about by means of or through the application of physical forces are known as physical unit operations. Because physical unit operations were derived originally from observations of the physical world, they were the first treatment methods to be used. Today, physical unit operations, as shown on Fig. 5-1, are a major part of most wastewater

Important physical characteristics of MSW include specific weight, moisture content, particle size and size distribution, field capacity, and compacted waste porosity. The discussion is limited to an analysis of residential, commercial, and some industrial solid wastes. Note, however, that the fundamentals of analysis presented in this and the following chapter are applicable to all types of solid wastes

Chapter Organization Introduction Basic Tariff Analysis Costs and Benefits of a Tariff Other Instruments of Trade Policy The Effects of Trade Policy: A Summary Summary Appendix I: Tariff Analysis in General Equilibrium Appendix II: Tariffs and Import Quotas in the Presence of Monopoly

1.1 Definition And History of Mechanical Engineering 1.2 Fields of Mechanical Engineering 1.3 Advantages of Mechanical Engineering in China 1.4 Prospects of Mechanical Engineering in China

1. memorize the key words, expressions and sentence patterns in the texts 2. understand and follow the major ideas of optimism and positive thinking 3. tell stories of optimism and positive thinking using language knowledge learnt in the unit 4. make a figure report on the author of text B 5. analyze and evaluate the writing styles and techniques of Text A & B 6. write a letter on optimism and positive thinking using some of the writing techniques learnt

Every community produces both liquid and solid wastes and air emissions. The liquid waste-wastewater, is essentially the water supply of the community after it has been used in a variety of applications. From the standpoint of sources of generation, wastewater may be defined as a combination of the liquid or water-carried wastes removed from residences

The first three types of control devices we consider--gravity settlers, cyclone separators, and electrostatic precipitators--all function by driving the particles to a solid wall, where they adhere to each other to form agglomerates that can be removed from the collection device and disposed of

• Scope of the course? (课程涵盖范围) • Applications (应用) • Prerequisites (先修知识要求) • Solution procedure (课程内容概览) • What did we learn from mechanics of material (材力概念回顾) • Generalization of concepts (材力概念扩展) • A 1D example of boundary value problems (1D边值问题示例) • Course outline (课程主要内容) • References (参考书目) • Grading and collaboration policies (评分政策) • Greek letters (希腊字母)

第一节 电化学分析法概述 generalization of electro-chemical analysis 一、电化学分析法的特点与学习方法 characteristics and learning method of electrochemical analysis 二、电化学分析法的类别 classification of electrochemical analytical methods 三、电化学分析法的应用领域 application field of electrochemical analysis 第二节 化学电池与电极电位 一、化学电池 chemical cell 二、电极电位与测量 electrode potential and detect 三、液接电位与盐桥 liquid junction potential and salt bridge 四、电极与电极分类 electrode and classification of electrodes 第二节 化学电池与电极电位 electrochemical cell and electrode potential