frontier
US /frʌnˈtɪr/
UK /ˈfrʌn.tɪər/
名词
1.
边境, 国界
a line or border separating two countries
示例:
•
The soldiers guarded the frontier between the two nations.
士兵们守卫着两国之间的边境。
•
They crossed the frontier illegally.
他们非法越过边境。
2.
边疆, 未开发地区
the extreme limit of settled land beyond which lies wilderness, especially in reference to the western US before the 20th century
示例:
•
Pioneers ventured into the vast American frontier.
拓荒者们冒险进入广阔的美国边疆。
•
Life on the frontier was harsh and challenging.
边疆的生活艰苦而充满挑战。
3.
前沿, 尖端
the extreme limit of understanding or achievement in an area of knowledge or endeavor
示例:
•
Space exploration represents the ultimate frontier of human endeavor.
太空探索代表着人类努力的终极前沿。
•
Scientists are pushing the frontiers of medical knowledge.
科学家们正在拓展医学知识的前沿。