20.However, a small number of sellers—an " oligopoly, " as economists call it—may cooperate with one another, either explicitly or tacitly, in setting prices and so produce results similar to those of a monopoly.
而,少数卖家——经济学家称之为“寡头垄断”——可能会在定价方面明示或默示地相互合作,从而产生
似于垄断的结果。机翻
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