reign
/reɪn/
a period during which something or somebody is dominant or powerful
中文释义：统治时期；主宰时期
The reign of Queen Victoria lasted for more than sixty years.
维多利亚女王的统治持续了六十多年。
During his reign as CEO, the company's profits doubled.
在他担任首席执行官期间，公司利润翻了一番。