(科技英语答案和译文.doc

Unit 1 练习答案及课文译文 Part 2 Reading A I 1 F 2 T　3F 4T　5T 6.F 7.T 8.T 9.F 10.T II 1. Reducing the time and cost of product development and production. 2. The product cycle is composed of two main processes：the design process and the manufacturing process． 3. The activities involved in the design process can be classified largely as two types：synthesis and analysis． 4. Rapid prototyping is becoming popular because this technology enables the construction of a prototype by deposition layers from the bottom to the top． 5. This includes the preparation of drawings，reports，and bills of materials. III 1.d 2.e 3.b 4.j 5.i 6.c 7.f 8.h 9.g 10.a IV 1.处理速度 2.用户友好的交互图形 3. 产品周期 4. 设计规格 5. 设计评价 6.CAD 7.CAM 8.CAE 9.design process 10.production process V 1. 除非能以较低的价格提供更好的质量及更短的交货时间提供新产品，否则任何企业都无法在当今的国际竞争中立足。 2. 设计过程始于由市场人员认定的用户需求，止于对产品的完整描述，通常用图形来表现。 3. 例如：尺寸缩小表示一张薄的材料由具有厚度属性的等效曲面来代表，或一个细长区域由具有截面特性的线段来表示。 4. 如图10-1所示，制造过程根据设计过程的图纸始于工艺计划，止于实际的产品。 5. 首先要导出一个分析模型，因为分析子过程适用于该模型而非设计本身。 VI. 1. Thus，to understand the role of CAD，CAM，and CAE，we need to examine the various activities and functions that must be accomplished in the design and manufacture of a product． 2. As illustrated in Fig. 10-1，the initial design activities（such as identification of the design need，formulation of design specifications，feasibility study with collecting relevant design information，and design conceptualization）are part of the synthesis subprocess． 3. Once the conceptual design has been developed，the analysis subprocess begins with analysis and optimization of the design． 4. This technology enables the construction of a prototype by deposition layers from the bottom to the top．Thus it enables the construction of the prototype directly from its design because it requires basically the cross-sectional data of the product． 5. Once process planning has been completed，the actual product is produced and inspected against quality requirements．Parts that pass the quality contro