second-order factor

例句：

1. 1. In economics, a second-order factor is a variable that affects the rate of change in another variable.
   在经济学中，一个二阶因素是一个影响另一个变量变化率的变量。
2. 2.The research team found that a second-order factor was responsible for the observed changes in the data.
   研究团队发现，一个二阶因素是导致数据观察到的变化的原因。
3. 3. The second-order factor analysis is used to identify patterns and relationships in large datasets.
   二阶因子分析用于识别大型数据集中的模式和关系。