roll back
phrasal verbroll something back
to to reduce the power or importance of something; to reverse the progress made with something 降低，削减（价格等） Many of the gains made in the last 20 years have been rolled back. 过去20年来取得的许多成就都被收回了。
to push something further away 击退；使后退 - (figurative)
to roll back the frontiers of space 拓展太空领域
- (figurative)
- (North American English)
to reduce prices, etc. 降低，削减（价格等） to roll back inflation 降低通货膨胀