“市场竞争”常见的英语表达是 market competition。
例句：
In today's global economy, market competition is becoming increasingly fierce.（在当今的全球经济中，市场竞争正变得日益激烈。）
The company needs to develop new strategies to cope with the intense market competition.（这家公司需要制定新的策略来应对激烈的市场竞争。）