ADJ-GRADED 富有经验的;老练的 You can use seasoned to describe a person who has a lot of experience of something. For example, a seasoned traveller is a person who has travelled a lot.
The author is a seasoned academic... 作者是一位经验丰富的学者。
He began acting with the confidence of a seasoned performer. 作为一名久经历练的表演者,他满怀自信地开始演出。