golden ages

例句：

1. 1. The country was at its golden age of development in the 20th century.
   该国在20世纪处于其发展黄金时期。
2. 2. The ancient civilization experienced a golden age of art and culture.
   古代文明经历了一个艺术和文化的黄金时期。
3. 3. The company's golden age is over, and it is now facing challenges in its new phase.
   公司的黄金时代已经结束，现在正面临新阶段的困难。