权威者

例句：

1. 1. The CEO is the most authoritative figure in the company.
   首席执行官是公司中最有权威的人物。
2. 2. She is an authority on ancient history.
   她对古代历史有着深厚的了解。
3. 3. The author's book has become a classic in its field.
   作者的书已成为其领域的经典之作。