noun · A person who has rendered great service in the founding of a nation or dynasty.

他是功勋卓著的开国元勋。

noun · A prominent figure or principal proponent who has made outstanding contributions to a specific field or cause.

他被公认为该学科领域的元勋。

noun · a person who plays a key role in the establishment of a nation or organization

他是共和国的开国元勋。

noun · a principal proponent or highly influential person in a specific movement or field

他是现代物理学研究的元勋之一。