frontier
英 [ˈfrʌntɪə]
[NOUN]
frontiers
1. [C 可数名词] （尤指知识的）前沿
The frontiers of something, especially knowledge, are the limits to which it extends.
双语例句
例：pushing back the frontiers of science.
推进科学前沿。
2. [C 可数名词] 国界
A frontier is a border between two countries.
双语例句
例：It wasn't difficult then to cross the frontier.
那时候穿越国界并不难。
NOUN. 名词
关注新东方在线考雅课程中心
免费获取雅思备考资料包
资料下载
雅思口语题库
扫码添加助教回复【口语题库】免费领取
公开课
编辑推荐