Chapter 4 Data Structure Key points: useful terms and definitions of data structure Difficult points: Stack, queue, tree

1. Concept of virtual reality 2. Applications of VRML 3. Describe the features of VRML 4. 了解广告文体的特点

1. Three reasons for using data structures are efficiency, abstraction, and reusability. 2. The properties of Stack, Queue, and Tree 3. 掌握常用英汉互译技巧

1. Terms of computer hardware 2. Organization of computers and their functions 3. 掌握专业词汇的构成规律，特别是常用词缀及复合词的构成

1. The origins of the programming languages 2. The concepts of computer compilers 3. Main properties of object-orientation 4. 了解UML，掌握复杂定语从句的翻译技巧

1. Principle of easiest penetration 2. The kinds of computer security breaches 3. What is firewall 4. 了解科技论文标题的写法

1. The trends of computer hardware and software 2. Basic characteristics of modern computers 3. Major characteristics of the four generations of modern computers 4. 了解科技英语的特点，掌握科技英语翻译要点

1. Multimedia Equipments 2. What is multimedia? 3. Main elements of multimedia 4. 了解英文摘要的写作技巧

1. Principle of easiest penetration 2. The kinds of computer security breaches 3. What is firewall 4. 了解英文摘要的写作技巧

Chapter 2 Organization of Computers Key points: useful terms and organization of computers Difficult points: describing the organization of computers