一、自然界中有四种基本相互作用力关于“力”的研究是一门最古老的科学,同时也是现代最前缘的科学内容.顾名思义,力学是研究力的一门学问.宇宙间没有孤立存在的“力”,它是在物质相互作用中表现出来的.最初,人们认识“力”的概念是从生产劳动和日常生活中开始的.人们观察到力是肌肉的伸缩,汉字“力”(篆文)字本身就是人筋的象形.我国古代有人称:“力,形之所以奋也.”这也就是说“力”是一种相互作用. I. The Four Basic Interactions in Nature The study of “force” is one of the oldest sciences and also the forerunner of modern science. As the name implies, mechanics is a learning force. There is no isolated existence in the universe Which is manifested in material interaction.Firstly, people began to understand the concept of “force,” starting from the production of labor and daily life.It was observed that the force is the stretching and contracting of the muscles and the Chinese character “strength” ( Zhuanwen) is itself a human pictographic glyphs in ancient China, some people say: “power, the reason why the shape is also.” This means that “force” is an interaction.