请帮我翻译下下面一段，中译英因子分析模型是主成分分析的推广，它也是利用降维的思想，由研究原始变量相关矩阵内部的依赖关系出

Factor analysis model is an extension of the principal component analysis, it also used the idea of dimensionality reduction, by the dependence of the correlation matrix of original variables of to some of the complex relationship between the variables is reduced to a few integrated factors, a multivariate statistical method. The total wages of employees in various regions is one of the important indicators of economic development, he generally contains 19 variables representing different industries. The purpose of this paper is to further reduce the number of relational variables (indicators) by factor analysis.