border/borderline/boundary/frontier.导航词义：边界

1. border:n. 边界，边境.多指靠近两国或两地区分界线的区域。

the German-Polish border

德国与波兰边境

Two years later, he was sent to the border between China and Myanmar.

两年以后，他被派到了中缅边界。

2. borderline:n. 边境线，分界线.指划定国与国之间边界的标志线。

the borderline between China and India

中印之间的边界线

3. boundary:n. 分界线，边界.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。

national/state/city boundary

国界/州界/市界

They marked the boundaries of the basketball court.

他们标出了篮球场的边界。

The river forms the boundary between my land and his.

这条河构成了我这块地和他那块地之间的分界线。

4. frontier:n. 边界，边境.指两国接壤的前沿地区，多有军队驻防。

China has a frontier with Vietnam.

中国的边界和越南相接。

Soldiers guard the frontier against invasion.

战士们守卫边疆，防止外敌入侵。

全部

1·Rugged individualism forged America's frontier society.

坚定的个人主义铸就了美国这个前沿社会。《柯林斯英汉双解大词典》

2·The rebels control the frontier and the surrounding area.

叛乱分子控制了边疆地区。《牛津词典》

3·They are planning to build a faithful recreation of the original frontier town.

他们正计划建造一座和原来边境城镇一模一样的复制品。《柯林斯英汉双解大词典》

4·The war was over before he was sent to the frontier.

战争在他被派往边境之前就结束了。

5·He argued for the frontier as an agent of social change.

他主张将边界作为社会变革的推动者。

6·Cross a frontier without adjusting and you can be in deep trouble.

不进行调整就跨越边界，你可能会遇到大麻烦。

7·The harsh realities of the frontier also shaped this tradition of hospitality.

边境的严酷现实也使得人们有了好客的传统。

8·In their works these authors tended to glorify women's contributions to frontier life.

在他们的作品中，这些作者倾向于赞颂妇女对边疆生活的贡献。

9·By the end of the 19th century, as the frontier vanished, the US had a mild panic attack.

到19世纪末，随着边疆的消失，美国人开始感到些许的恐慌。

10·By the middle of the twentieth century, the Frontier Thesis fell into disfavor among historians.

到了20世纪中叶，“边疆假设”在历史学家中渐渐失宠。

前沿

1·Rugged individualism forged America's frontier society.

坚定的个人主义铸就了美国这个前沿社会。《柯林斯英汉双解大词典》

2·Precisely because of this masculine orientation, revising the frontier thesis by focusing on women's experience introduces new themes into women's history.

正是由于这种男性化的取向，通过关注女性的经历来修正前沿命题，为女性的历史引入了新的主题。

3·There's a new frontier in 3D printing that's beginning to come into focus: food.

3D打印有一个新的前沿领域开始受到关注:食物。

4·A comparison point is in the 1990s battles over encryption, said Kurt Opsahl, general counsel of the Electronic Frontier Foundation, a privacy watchdog group.

“可与之相比的就是20世纪90年代有关加密的争夺战，”库尔特·奥普萨尔说道，他是隐私监督组织电子前沿基金会的法律总顾问。

5·None of this is news to technology companies and those on the frontier of adoption.

这些对于那些站在科技前沿的企业来说不算什么新闻了。

边境

1·They are planning to build a faithful recreation of the original frontier town.

他们正计划建造一座和原来边境城镇一模一样的复制品。《柯林斯英汉双解大词典》

2·The war was over before he was sent to the frontier.

战争在他被派往边境之前就结束了。

3·The harsh realities of the frontier also shaped this tradition of hospitality.

边境的严酷现实也使得人们有了好客的传统。

4·In Turnerian terminology, the frontier had furnished a gate of escape from the bondage of the past.

用 Turnerian 的话来说，边境提供了“逃离过去束缚的大门”。

5·His maternal grandfather had been that Francisco Flores, of the Second Line-Infantry Division, who had died on the frontier of Buenos Aires.

他的外祖父是第二步兵师的弗朗西斯科·弗洛雷斯，死在布宜诺斯艾利斯的边境上。

边疆

1·In their works these authors tended to glorify women's contributions to frontier life.

在他们的作品中，这些作者倾向于赞颂妇女对边疆生活的贡献。

2·By the end of the 19th century, as the frontier vanished, the US had a mild panic attack.

到19世纪末，随着边疆的消失，美国人开始感到些许的恐慌。

3·By the middle of the twentieth century, the Frontier Thesis fell into disfavor among historians.

到了20世纪中叶，“边疆假设”在历史学家中渐渐失宠。

4·The frontier town boomed when gold was discovered nearby.

当那个边疆城镇附近发现金矿时它迅速而蓬勃发展起来。

5·There's a new frontier in technology: digital entertainment and communication.

他们触及了技术的新边疆：数字娱乐与通讯技术。

边界

1·He argued for the frontier as an agent of social change.

他主张将边界作为社会变革的推动者。

2·Cross a frontier without adjusting and you can be in deep trouble.

不进行调整就跨越边界，你可能会遇到大麻烦。

3·Facilitate interactions with policy-makers on latest national and regional initiatives and frontier issues.

促进与决策者就最新的国家和区域倡议以及边界问题进行交流。

4·Irving Fisher also drew on the curve, a production possibility frontier for society, which he made downward-curved.

欧文·费雪还画了一条曲线，一条社会的生产可能性边界，他让它向下弯曲。

5·Celebrity is a frontier existence. It involves people whose lives are represented by the media as full of incident and emergency.

名人是一种边界性的存在，涉及的是那些生活被媒体描述为充满事件和紧急情况的那些人。

国境

1·Article 7 Persons and conveyances on entering the country shall be subject to quarantine inspection at designated places at the first frontier port of their arrival.

第七条入境的交通工具和人员，必须在最先到达的国境口岸的指定地点接受检疫。

2·He escaped over the frontier.

他逃过了国境。

3·Article 15 Frontier health and quarantine offices shall monitor persons on entry or exit for quarantinable infectious diseases and shall take necessary preventive and control measures.

第十五条国境卫生检疫机关对入境、出境的人员实施传染病监测，并且采取必要的预防、控制措施。

4·All vessels docking at the frontier pORts are required to be rodent free and in possession of a valid Derat OR Deratting Exemption Certificate.

所有停靠在国境口岸的船舶都要求没有啮齿动物并具有有效的除鼠证书或免于除鼠证书。

5·Objective To prevent the spreading of water-born infectious diseases, do effective surveillance on their pathogeny in Zhujiang water at the frontier port area.

目的通过监测口岸辖区内珠江水中水源性传染病病源，有效地预防水源性传染病在国境口岸的传播。

(1)new frontier新边疆；新境界

(1)frontier trade边境贸易

(1)efficient frontier有效边界；效率前缘

(1)frontier orbital前沿轨道