(一)“人类的生产活动是最基本的实践活动、是决定其他一切活动的东西。”无论那一种知识离开实践是不可能得到的。材料力学也正是这样,是和生产实践密切结合在一起的。它的产生、发展和每一新理论的建立,都首先是由生产实践提出任务,要求人们去解决,这就是推动材料力学发展的根本动力。同时生产实践中出现了有关这类问题的大量现象、资料,使人们有这种实践可以观察研究,获得丰富的感性认识,而生产又提供了科学研究的工具,在 (1) “The productive activities of mankind are the most basic practical activities and are the things that determine everything else.” It is impossible to obtain knowledge of any kind of knowledge without practice. Material mechanics, too, is so closely integrated with production practices. Its production, development and the establishment of each new theory are first of all proposed tasks by the production practice, requiring people to solve it, which is to promote the development of material mechanics, the fundamental driving force. At the same time, a great deal of phenomena and data on such issues have emerged in production practice, so that people can observe and study this practice and acquire rich perceptual knowledge. Production also provides a tool for scientific research.