tit for tat
以牙还牙；针锋相对
口语·形容报复或对等回应
英文释义
an equivalent retaliation; a response in kind; an action that is done to someone as a punishment or because they have done something bad to you
例句
She took my pen, so I took her book—just tit for tat.
典故来源
源自16世纪英语，可能由‘tip for tap’演变而来，意为以同等行为回应。