市场竞争 (Shìchǎng jìngzhēng) - market competition: The rivalry between businesses competing for customers' attention and money.
垄断企业 (Lǒngduàn qǐyè) - monopoly enterprise: A company that has exclusive control over a particular product or service in a given market.
不正当竞争 (Bù zhèngdàng jìngzhēng) - unfair competition: Practices that go against fair business ethics, such as false advertising or predatory pricing.