Monopoly: When a single supplier, helped by various barriers to entry, controls the market for a particular good or service, thus ben.

• 垄断:指某个供应商因各种市场进入壁垒而控制了某一产品或服务的市场,从而享受到可以自由定价、自行决定质量水准而役有竞争压力的好处。