intermediate variable

例句：

1. 1. In this model,the intermediate variable is used to represent therelationship between two variables.
   在这个模型中，中间变量用来表示两个变量之间的关系。
2. 2. The intermediatevariable is a key factor in determining theoutcome of the experiment.
   中间变量是决定实验结果的关键因素。
3. 3. The intermediate variable was usedto measure the effect of the treatment onthe response variable.
   中间变量被用来测量治疗对响应变量的影响。