frontier
/'frʌntjә/
高考四级六级考研托福雅思
释义
- n边界, 边境
- [法] 国境, 边境, 边界
英文释义
n. a wilderness at the edge of a settled area of a country
n. an international boundary or the area (often fortified) immediately inside the boundary
n. an undeveloped field of study; a topic inviting research and development
词频与标注
词性分布
- n 名词100%
来自 BNC 语料库统计，百分比是该词以这种词性出现的比例
词形变化
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