在现代技术进步的时代,有时却有一种错误的想法,认为在过去发展过程中没有什么可从值得学习的东西。这种说法,只要回顾一下古代某些时期的具体生产,就可发现它是错误的。人类在数千年的过程中,凭经验创造了加工和利用各种材料的方 In the era of modern technological advancement, there is sometimes a wrong idea that there is nothing worth learning from in the past. This statement, as long as we recall the specific production of certain periods in ancient times, we can find it wrong. In the course of thousands of years, human beings have created the methods to process and use various materials.