frontier
🇺🇸
/frʌnˈtɪr/
🇬🇧
/ˈfrʌntɪə(r)/
noun
R
a border between countries or areas
The town sits on the frontier between two nations.
这个城镇位于两个国家的边境上。
R
the wild, unsettled land at the edge of a settled area
Pioneers moved west to live on the American frontier.
拓荒者向西迁移，在美国的边疆地区生活。
R
the farthest limit of knowledge or progress
Scientists are pushing the frontier of medical research.
科学家们正在推动医学研究的前沿。
translation
边界, 边疆, 前沿
词形变化
Plural
frontiers