regress

1. V-I When people or things regress, they return to an earlier and less advanced stage of development. 退步[正式]

If your child regresses to babyish behaviour, all you know for certain is that the child is under stress. 如果你的孩子退步到幼稚的行爲，你可以肯定的是孩子正処在壓力之下。

2. regressionN-VAR 退步

Calderdale accepts that this can cause regression in a student's learning process. 考爾德戴爾承認這會在學生的學習過程中引起退步。