frontier

noun

1. 国界；边界；边境
   a line that separates two countries, etc.; the land near this line
   1. the frontier between the land of the Saxons and that of the Danes
      撒克逊人土地和古斯堪的纳维亚人土地的边界
   2. a customs post on the frontier with Italy
      与意大利的交界边境上的海关关卡
   3. a frontier town/zone/post
      边陲小镇；边疆地带；边防站
2. （尤指19世纪美国西部的）开发地区边缘地带，边远地区
   the edge of land where people live and have built towns, beyond which the country is wild and unknown, especially in the western US in the 19th century
   1. a remote frontier settlement
      边远地区定居点
3. （学科或活动的）尖端，边缘
   the limit of sth, especially the limit of what is known about a particular subject or activity
   1. to push back the frontiers of science (= to increase knowledge of science)
      开拓科学新领域
   2. to roll back the frontiers of government (= to limit the powers of the government)
      限制政府权力

1. N-COUNT 边界;边境
   A frontier is a border between two countries.
   1. It wasn't difficult then to cross the frontier.
      那时穿越边境并不困难。

in AM, usually use 美国英语通常用border


2. N-COUNT 西部边疆,边远地区(指 20 世纪前美国西部欧洲移民尚未定居的部分)
   When you are talking about the western part of America before the twentieth century, you use frontier to refer to the area beyond the part settled by Europeans.
   1. ...a far-flung outpost on the frontier.
      远驻西部边疆的前哨
3. N-COUNT (尤指知识的)前沿，尖端，新领域
   The frontiers of something, especially knowledge, are the limits to which it extends.
   1. ...pushing back the frontiers of science.
      推进科学前沿
   2. ...technological frontiers.
      技术尖端

1. It wasn't difficult then to cross the frontier.
   那时穿越边境并不困难。
2. Rugged individualism forged America's frontier society.
   坚定的个人主义造就了美国的边疆社会。
3. Until very recently Texas was an unsettled frontier.
   就在没多久之前，得克萨斯州还是一个荒无人烟的边远地区。
4. The art troupe is always on the move in frontier guards.
   文工团常年在边防部队流动。
5. Troops are massing on the frontier.
   部队在边境集结。
6. The frontier guards, ever on the alert, stand watch over the borders of our country.
   边防部队常备不懈地守卫着祖国边疆。
7. Frontier incidents have been common on the border.
   边界事件在边境上时常发生。
8. Areas near the frontier were rough and lawless in the old days.
   过去边远地区混乱不堪，而且没有法律。
9. The frontier is so well guarded that no one can get across.
   国境线守卫严密得没人能越过去。
10. The novel vividly depicts the life of young people in the frontier region.
    这部小说生动地描绘了边疆青年的生活。
11. So that I think is another frontier.
    因此，我认为这是另一个前沿领域。
12. Strengthen construction of highway of main way and key zone national defense, frontier defence.
    加强主要方向和重点地区国防、边防公路建设。
13. The revolving movement of M-V portfolio efficient frontier is given by means of efficient security and inefficient security.
    引入了有效证券和无效证券，给出了M-V证券组合有效前沿旋移的方向。
14. This paper uses stochastic frontier production function to compares the technical efficiency level of different ownership of enterprises.
    采用随机前沿生产函数对不同所有制企业的技术效率水平进行了比较评价。
15. Our frontier guards, fighting in self-defence, threw back the invading troops.
    我边防战士在自卫战中打退了入侵的军队。
16. Your country and mine have a common frontier.
    你的国家和我的国家有一条共同的边界。
17. The Customs officer opened my case at the frontier.
    在边境上海关人员打开了我的箱子。
18. On the frontier of new technology in security and law enforcement is the study of biometrics.
    安全和执法技术的最尖端领域就是计量生物学所研究的对象。
19. China is the new frontier, after all.
    毕竟，中国是一个新的领域。
20. Prediction for deep ore prospecting is a frontier and key research in metallogeny and metallogenic prognosis.
    深部找矿预测已成为当前成矿学和成矿预测学的科学前沿和研究重点。
21. Population distribution and its change rule have become the focus and frontier of demography and geographic information science.
    人口分布及其变化规律成为人口学和地理信息科学研究的前沿及热点问题之一。
22. Western officials say convoys carrying weapons for the Taliban have crossed Iran's frontier with Afghanistan.
    西方官员表示，为塔利班运送武器的车队已经跨越了伊朗与阿富汗的边界。
23. The frontier guards together with the militiamen drove out the invaders.
    边防战士和民兵一起把入侵者赶了出去。
24. That is the question of the New Frontier.
    这就是新边疆向我们提出的问题。
25. The local people's government should support the construction of the institutions and facilities of the frontier ports.
    地方人民政府要支持边境口岸机构和设施的建设。
26. This change in admissions criteria and teaching methodology and content is probably the next frontier for business schools.
    录取标准和授课方法以及内容的变化，可能是商学院的下一个发展方向。
27. We crossed the frontier between France and italy.
    我们穿越了意大利和法国之间的边界。
28. Abstract: some frontier technologies and design concepts in the development of analytical instrumentation in recent years are reviewed.
    文摘：评述了近年来现代分析仪器发展的前沿技术和设计思想。
29. So that's the expected return and efficient portfolio frontier problem.
    这就是预期收益，和有效边界问题。
30. Then it indicates that the ecology of Salt-sea does harm to Central Asia and the north-west frontier in China.
    其次说明了咸海生态危机对中亚和中国西北边疆造成的危害。

  border borderline boundary frontier【导航词义：边界】

  border n. 边界，边境

〔辨析〕多指靠近两国或两地区分界线的区域。

  borderline n. 边境线，分界线

〔辨析〕指划定国与国之间边界的标志线。

  boundary n. 分界线，边界

〔辨析〕侧重指某区域最外的界线，常和领土有关，也指地图上正式标定的、双方认可的边界或较小行政单位间的界线。

  frontier n. 〈尤英〉边界，边境

〔辨析〕指两国接壤的前沿地区，多有军队驻防。

noun

1. an undeveloped field of study
   1. he worked at the frontier of brain science

2. an international boundary or the area (often fortified) immediately inside the boundary

3. a wilderness at the edge of a settled area of a country
   1. the individualism of the frontier in Andrew Jackson's day