rollback

n. 回降, 卷回, 推回去
【电】 滚返

roll.back

n.（名词）
A reduction, especially in prices or wages, to a previous lower level by governmental action or direction:
回落，削减：尤指物价或工资由于政府采取行动或命令而下降到原先较低的水平：
例句：
a price rollback; a rollback of military supplies.
物价的回落；军用物资的削减

A turning back or retreat, as from a previously held position or policy:
退后：如从原先占据的位置或政策中退却：
例句：
Conservatives hoped for a rollback of left-wing support for the controversial new legislation.
保守派希望左派能撤回他们对有争议的新立法的支持