把下面这句改写的学术一点Equations 2-4 constitute a multi-equation system The mediation effect includes the independent mediation effect and the chained mediation effect with former presents intelligent developmen

Equations (2)-(4) represent a system of multiple equations. The mediating effect comprises of two types, namely, the independent mediating effect and the chained mediating effect. The former is characterized by the following causal chain: "intelligent development → income structure adjustment → alleviation of human capital misallocation" and "intelligence development → human capital flow → alleviation of human capital misallocation". The latter is characterized by the following causal chain: "intelligent development → income structure adjustment → human capital flow → alleviation of human capital misallocation"