n.卖方寡头（少数卖主）垄断，寡头专卖

原形：oligopoly复数：oligopolies

The telecommunications industry is often characterized as an oligopoly.
电信行业通常被描述为寡头垄断。
In an oligopoly, a few firms dominate the market.
在寡头垄断中，少数几家公司主导市场。
The oil industry is an example of an oligopoly where a few companies control most of the market.
石油行业是寡头垄断的一个例子，少数几家公司控制着大部分市场。
The market for commercial aircraft is considered an oligopoly dominated by Boeing and Airbus.
商用飞机市场被认为是波音和空客主导的寡头垄断。
Oligopolies can lead to less competition and higher prices for consumers.
寡头垄断可能导致竞争减少，消费者面临更高的价格。
Antitrust laws are designed to prevent the formation of oligopolies and promote fair competition.
反托拉斯法旨在防止寡头垄断的形成，促进公平竞争。
The pharmaceutical industry is sometimes criticized for behaving like an oligopoly.
制药行业有时因其行为类似寡头垄断而受到批评。
In an oligopoly, firms may collude to fix prices or divide markets.
在寡头垄断中，企业可能会共谋固定价格或划分市场。
The presence of high barriers to entry can contribute to the formation of an oligopoly.
高进入壁垒的存在可能促成寡头垄断的形成。
Regulatory bodies often monitor oligopolistic industries to ensure they do not abuse their market power.
监管机构通常会监控寡头垄断行业，以确保它们不会滥用市场权力。