done and done

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释义

完全摆平，一言为定
a phrase used to accept a request or deal;
a slang term meaning "consider it done"

例句
eg:Jenny： Monday? Lunch on the steps?
Blair:Done and done.(Gossip girl)
珍妮：周一？楼梯上吃午餐？
布莱尔：一言为定。（绯闻女孩）