人们对自然界中溶液的稀释与浓缩现象非常熟悉。其实,在社会生活中,经济、人口等多种系统也有类似的现象。作为城市化物质载体的人口与土地,在由农村流向城市的同时,会产生类似于溶液的稀释或浓缩的效应,从而使其自身的属性发生改变。一、城市化的人口效应人口有多种属性,自然 People are very familiar with the dilution and concentration of solutions in nature. In fact, in social life, there are similar phenomena in various systems such as economy and population. The population and land that are the carrier of urbanization materials, while flowing from the countryside to the cities, will produce effects similar to dilution or concentration of the solution, thus changing its own attributes. I. Population effects of urbanization Population has many attributes, natural