a market in which there are only a few companies producing or selling a product or service. This can result in less competition and higher prices for customers. Due to oligopolies and reduced competition, Americans pay far more for internet than the rest of the world. 由于寡头和竞争的减少，美国人为互联网支付的费用远远高于世界其他地区。 The three main companies have been operating as an oligopoly to maintain their dominance in the market. 三大主要公司一直处于寡头垄断状态，以保持其在市场中的主导地位。