这个公司由几个高层管理者掌控，结构非常寡头化。

The company is controlled by a few top managers, making its structure quite ___oligarchical.

这个小国家的政治体系实际上是寡头统治的，由几个富裕家族控制着一切。

The political system of this small country is essentially ___oligarchical, controlled by a handful of wealthy families.