constrained variable metric method

例句：

1. 1.This method is constrained by the limited resources available.
   这种方法受限于可用资源。
2. 2. The research team used a constrained variable metric method to analyze the data.
   研究团队使用一种约束变量度量法来分析数据。
3. 3. The results of this study are constrained by the limitations of the sample size.
   这项研究的结果是受限于样本大小的限制。