Lesson 1 Machinery design may be simple or enormously complex, easy or difficult, mathematical or nonmathematical, it may involve a trivial problem or one of great importance. 机械设计可能简单，可能复杂；可能容易，可能困难；可能要求精确，也可能不精确；有时要解决的可能是一些很平常琐碎的问题，也可能是非常重大的问题。 In the modern industrialized world, the wealth and living standards of a nation are closely linked with their capabilities to design and manufacture engineering products. It can be claimed that the advancement of machinery design and manufacturing can remarkably promote the overall level of a country’s industrialization. 在现代的工业化社会，一个国家的财富和生活水平与他们设计和制造工程产品的能力紧密相关，可以说机械设计和制造业的进步能显著地促进一个国家工业化整体水平的提高。 Definition of problem is necessary to fully define and understand the problem, after which it is possible to restate the goal in a more reasonable and realistic way than the original problem statement. 定义问题对全面认识、理解问题非常必要，之后可以更加合理可行的方式来重新阐述。 The synthesis is one in which as many alternative possible design approaches are sought, usually without regard for their value or quality. 综合就是对各种可供选择的设计方法进行进一步研究，这时往往不考虑这些方法的设计特点和设计质量。 This is also sometimes called the ideation and invention step in which the largest possible number of creative solutions is generated. 这有时也称为构思和发明阶段，在这个阶段中要产生尽可能多的有创意的想法。 The competent engineer should not be afraid of the possibility of not succeeding in a presentation 有能力的工程师不应该害怕在提高自己的方案时遭遇失败。 In fact, the greatest gains are obtained by those willing to risk defeat. 实际上，失败乃成功之母。 there is strong sense of satisfaction an...
