frontier
n
1 [C]
(a) ~ (between sth and sth); ~ (with sth) border between two countries 国界; 边界
the frontier between Austria and Hungary 奥地利和匈牙利之间的边界.
(b) land on either side of such a border 边疆; 边陲; 边境; 国境
[attrib 作定语]
a frontier zone 边境地带
a frontier town 边疆城镇
frontier disputes 边界争端.
2 the frontier [sing]
(esp US) extreme limit of settled land, beyond which the country is wild and undeveloped 已开发地区的边缘地带
Beyond the frontier lay very real dangers. 在开发地区以外十分危险.
3 the frontiers [pl]
extreme limit, esp of knowledge about sth 极限(尤指有关某事物的知识的); 尖端; 边缘
advance the frontiers of science 拓展科学的领域
teach near the frontiers of one´s subject, ie give recently discovered information 讲授个人专业领域的新知识. =>Usage at border 用法见border.