Cách sử dụng
"Roll back" means to revert or undo something that was done previously. It is often used in the context of undoing changes or going back to a previous version. For example, if you update an app on your phone and it doesn't work properly, you might roll back to the previous version. It is also used in a broader sense to describe undoing policies or actions, such as rolling back regulations or rolling back military deployments.