近年,随着经济的发展,人们生活水平的不断提高,越来越多的人弃农从工。大量的农民工如涌潮般流入城市,而退耕引起的连锁反应不免让人们对当前的现象进行慎重分析,对未来的变化做出预测。从悲观的角度看,如生态平衡一样,人类的经济方式在某个环节出现变动,一连串的 In recent years, with the development of economy and the continuous improvement of people’s living standards, more and more people have abandoned their jobs. A large number of migrant workers flow into the city like a tidal wave, and the chain reaction caused by the retreat will inevitably lead people to make a careful analysis of the current phenomenon and make predictions about future changes. From a pessimistic point of view, as with ecological balance, the human economy has changed at a certain stage, a series of