关于经济学的理论是多种多样的。根据本章的论题,我们认为经济学具有两种主要作用:解释(或阐明)现存的或以往的经济现实,并预测未来的经济发展。就这方面而言,不论我们是运用数学语言还是文字语言都无关紧要,只要表述适当即可。数学方法如果能正确运用,则具有在表述上更为精确严谨的优点;而且在表达某些含义和进行逻辑分析方面,数 There are many theories about economics. According to the thesis of this chapter, we think economics plays two major roles: to explain (or clarify) existing or past economic realities and to predict future economic development. In this respect, it does not matter whether we use mathematical language or written language, as long as we make the right statement. Mathematical methods, if used correctly, have the advantage of being more precise and rigorous in expression; and in expressing some meaning and conducting logical analysis, the number