高分！求机械专业高材生。翻译专业英语，不要软件翻译的。谢谢要自己翻的！

高分！求机械专业高材生。翻译专业英语，不要软件翻译的。谢谢要自己翻的！
Technical Reading
1. Computer-Aided Design (CAD) and Engineering (CAE) Computer-aided design involves the use of computers to create design drawings and product models. Computer-aided design is usually associated with interactive computer graphics (known as a CAD system).Computer-aided design systems are powerful tools and are used in the mechanical design and geometric modeling of products and components.
Computer-aided engineering simplifies the creation of the database, by allowing several applications to share the information in the database. These applications include, for example, (a) finite-element analysis of stresses, strains, deflections, and temperature distribution in structures and load-bearing members, (b) the generation, storage, and retrieval of NC data, and (c) the design of integrated circuits and other electronic devices.
In CAD, the drawing board is replaced by electronic input and output devices, an electronic plotter, and a data tablet (Fig.8-3), which is divided into sections. Each section represents a mathematically defined geometric function (such as coordinate points, line, plane, circle, or cylinder), called a menu item.
When using a CAD system, the designer can conceptualize the object to be designed more easily on the graphics screen and can consider alternative designs or modify a particular design quickly to meet the necessary design requirements or changes. The designer can then subject the design to a variety of engineering analyses and can identify potential problems (such as an excessive load or deflection). The speed and accuracy of such analyses far surpass what is available from traditional methods.

技术阅读
1. 计算机辅助设计和工程 计算机辅助设计包括使用计算机创作设计图和产品模型。计算机辅助设计通常和交互式计算机图形（也称作计算机辅助设计系统）相关联。计算机辅助设计系统是强大的工具，能用来进行产品和部件的力学设计和几何建模。
计算机辅助工程能让几个应用程序共享数据库的信息，从而简化了数据库的生成过程。这些应用程序包括如(a) 结构和载荷成分的应力、应变、偏移及温度分布的有限元分析；(b) 数控数据的生成、储存和取回；(c) 集成电路和其它电子设备的设计
在计算机辅助设计中，传统的画图板被电子输入输出设备所取代，比如电子绘图仪和数据输入板（如图8-3），它们被分成不同的部分。每部分被称为菜单项，代表一个数学上定义的几何功能（比如坐标点、线、面、圆型、圆柱）。
当使用计算机辅助设计系统时，设计者可以让实体概念化，这样更容易在图像屏幕上进行设计并且可以更快地想出替代设计或更改特定的设计以满足必需的设计要求或设计变化。设计者可以接着让自己的设计应用一系列工程分析以发现潜在的问题（比如说过载或偏移）。这些分析的速度和准确性远远高于可被应用的传统方法。