to push (back) the frontiers
01
to expand the boundaries or limits of knowledge, discovery, or understanding, typically in science, technology, or exploration
예시들
Scientists continuously strive to push back the frontiers of medical research.
02
to extend the boundaries of a region or country, often through exploration, colonization, or territorial conquest
연어
예시들
European explorers pushed back the frontiers of the known world by discovering new continents.
