An autonomous entity or power center existing within a larger organization or system, often acting with significant independence from the central authority.
这家公司虽然规模庞大，但研发部门由于其独特的管理模式和决策权，几乎成了一个“国中之国”。
Despite the company's vast size, the research and development department, with its unique management style and decision-making autonomy, almost operates as a 'state within a state'.
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