frontiers

英 [ˈfrʌntɪəz]

美 [frənˈtɪrz]

n. 国界; 边界; 边境; (尤指19世纪美国西部的)开发地区边缘地带，边远地区; (学科或活动的)尖端，边缘
frontier的复数

Collins.2

柯林斯词典

N-COUNT 边界;边境
Afrontieris 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

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 usefrontierto 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
N-COUNT (尤指知识的)前沿，尖端，新领域
Thefrontiersof 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

双语例句

From this vantage point, the region expanded the health agenda to cover new frontiers.
欧洲区域再接再厉，扩大了卫生议程，开拓了新的疆域。
They performed meritorious deeds in the fight to defend the frontiers of the motherland.
在保卫祖国边疆的战斗中他们立了功。
But when the federal government builds walls around industries, it also blocks the exploration of new frontiers.
但是，当美国联邦政府在美国各行各业周围建立起围墙的时候，它也挡住了向新疆域的探索。
This advanced yet pragmatic approach has opened up new frontiers in innovation and economies of scale, impacting the fundamentals of how teams deliver products.
这种高级而且实用的方法，在创新和规模经济方面开辟了一条新的道路，影响到了团队怎样交付产品的基础。
There is no way to maintain the frontiers of freedom without cost and commitment and risk.
没有代价、承诺和风险，就不可能维持自由的边界。
Already China is embroiled in skirmishes and politicking on new frontiers.
中国已经在一些新领域卷入了小规模的冲突和政治活动。
Researchers are pushing back the frontiers and opening doors to reveal why things happen and how things work.
研究者们拓展了其研究领域，介绍并揭示了事物发生的原因和机理。
For11 years, I was the host of the public television series Scientific American Frontiers.
11年来，我一直是大众电视系列片‘美国科学前沿’的主持人。
You are exploring the frontiers in science.
你在探究科学的新领域。
On the frontiers they met fierce resistance and defeat that spelled eventual disaster.
在边界地区他受到了猛烈的抵抗，失败了，这一失败引起了灾难性后果。