1. The country was ruled by a small group of oligarchs who controlled almost every aspect of the economy.

这个国家由一小群控制着经济几乎方方面面的寡头统治。

2. The oligarchs amassed great wealth and power, leaving the majority of the population impoverished.

寡头积累了巨大的财富和权力，使大部分人口陷入贫困。