two-variable single equation estimator

例句：

1. 1. This two-variable single equation estimator is usedto estimate the relationship between variables X andY.
   这个双变量单方程估计器用于估计变量X和Y之间的关系。
2. 2. Thetwo-variable single equation estimator wasdeveloped by a team of researchers to analyzecomplex data sets.
   这个双变量单方程估计器是由一支研究人员团队开发的，用于分析复杂的数据集合。
3. 3. Thetwo-variable single equationestimator has been widely usedin various fields such as economics, finance, and marketing.
   这个双变量单方程估计器在经济学、金融和市场营销等多个领域得到了广泛应用。