regress|regressed|regresses

我们需要对这两个变量进行回归分析以确定它们之间的关系。

We need to ___regress these two variables to determine their relationship.

在治疗取得进展后，他的健康状况又出现了倒退。

After showing improvement, his health ___regressed again.

剔除异常值后，模型的表现不再倒退。

After removing the outliers, the model's performance no longer ___regresses.