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重量级人物（或组织）;有影响力的人物（或组织）
If you refer to a person or organization as a heavyweight, you mean that they have a lot of influence, experience, and importance in a particular field, subject, or activity.
例句
He was a political heavyweight.
他是一名政界要人。
...jazz heavyweights.
爵士乐坛的重量级人物