backslide

But if you backslide, Hiram says, “Start over.

但假如你倒退了，海勒姆说，“那就重新开始。

The national economy, meanwhile, is continuing to backslide.

美国经济，在此期间，正在继续倒退。

You've done a good job in the exam, I hope you won't backslide.

你考试考得不错，我希望你不要退步。