field day

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释义
有重大事件的日子；获得大成功的日子；极快乐的日子
A great time or a great deal to do.

例句
Jane: Well, the psychologists wanna talk to you next. They'll have a field day with that.(The Mentalist)
简：好吧，心理学家很想找你谈谈。对他们来说会是重大事件的日子。（超感神探）