英语翻译OverviewCurrent Computer-Aided Design software packages

英语翻译
Overview
Current Computer-Aided Design software packages range from 2D vector-based drafting systems to 3D solid and surface modellers.Modern CAD packages can also frequently allow rotations in three dimensions,allowing viewing of a designed object from any desired angle,even from the inside looking out.Some CAD software is capable of dynamic mathematic modeling,in which case it may be marketed as CADD — computer-aided design and drafting.
CAD is used in the design of tools and machinery and in the drafting and design of all types of buildings,from small residential types (houses) to the largest commercial and industrial structures (hospitals and factories).
CAD is mainly used for detailed engineering of 3D models and/or 2D drawings of physical components,but it is also used throughout the engineering process from conceptual design and layout of products,through strength and dynamic analysis of assemblies to definition of manufacturing methods of components.
CAD has become an especially important technology within the scope of computer-aided technologies,with benefits such as lower product development costs and a greatly shortened design cycle.CAD enables designers to lay out and develop work on screen,print it out and save it for future editing,saving time on their drawings.
The people that work in this field are called:Designers,Cad Monkeys,Automotive Design Engineers,and Digital Innovation Engineers.
Software technologies
Originally software for Computer-Aided Design systems was developed with computer languages such as Fortran,but with the advancement of object-oriented programming methods this has radically changed.Typical modern parametric feature based modeler and freeform surface systems are built around a number of key C (programming language) modules with their own APIs.A CAD system can be seen as built up from the interaction of a graphical user interface (GUI) with NURBS geometry and/or boundary representation (B-rep) data via a geometric modeling kernel.A geometry constraint engine may also be employed to manage the associative relationships between geometry,such as wireframe geometry in a sketch or components in an assembly.
Unexpected capabilities of these associative relationships have led to a new form of prototyping called digital prototyping.In contrast to physical prototypes,which entail manufacturing time and material costs,digital prototypes allow for design verification and testing on screen,speeding time-to-market and decreasing costs.As technology evolves in this way,CAD has moved beyond a documentation tool (representing designs in graphical format) into a more robust designing tool that assists in the design process

概要
　　Current计算机辅助设计软件包从第2个基于传染媒介的征兵制度范围到3D坚实和表面做模型者.现代CAD包裹可能常常地也允许在三个维度的自转,允许一个被设计的对象的观察从所有期望角度的,甚而从看的里面.在它也许被销售当CADD —计算机辅助设计和起草情况下,一些CAD软件能够动态数学塑造.
　　CAD用于工具和机械设计和在大厦的所有类型起草和设计,从小住宅类型(房子)对最最大的商业和工业结构(医院和工厂).
　　CAD为3D模型和物理组分第2张图画详细的工程学主要使用,但是它也使用在从概念设计的工程学产品中过程和布局,通过力量和对对组分制造方法的定义的汇编的动态分析.
　　CAD成为了特别重要技术在计算机辅助技术的范围内,与好处例如更低的产品开发费用和一个很大地缩短的设计周期.CAD使设计师计划和开发在屏幕的工作,打印它出来和保存它未来编辑的,节省时间在他们的图画.
　　在这个领域工作的The人告诉：设计师、Cad猴子、汽车设计工程师和数字式创新工程师.
　　Software技术计算机辅助设计系统的Originally软件开发了与计算机语言例如FORTRAN,但是与面向对象的编程技术方法的推进这根本地改变了.典型的现代参数特点基于模型工和自由形态表面系统在与他们自己的APIs的一定数量的钥匙C (编程语言)模块附近被建立.计算机辅助设计系统能看如被加强从一个图形用户界面(GUI)的互作用与NURBS几何和界限表示法(Brep)数据通过一个几何塑造的仁.几何限制引擎也许也被使用处理几何之间的结合关系,例如在剪影的wireframe在汇编的几何或组分.
　　这些结合关系的Unexpected能力导致了原型叫的数字式原型的一个新的形式.与物理原型对比,需要制造业时间和材料费用,数字式原型考虑到在屏幕、加速的时间对市场和越来越少的费用的设计证明和测试.当技术这样演变,CAD在文献工具之外搬入(代表设计以图解格式)在设计过程中协助的一套更加健壮的设计工具 .
　　应该是这样~!