frontier [frʌnˈtɪr]

例句:

• A "frontier-free" Europe implies a greatly increased market for all economic operators.
  “无国界的”欧洲对所有经营者来说都意味着一个大大扩展了的市场。
  
• They are highly interested in the frontiers of science.
  他们对于科学的新领域有浓厚的兴趣.
  
• Traversed the frontier between metaphysical speculation and empirical science.
  来自A. Koestler
• 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。
  
• 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
  
• The 'black bands' who still Ravage the frontier.
  来自Byron
• Some Obama administration officials call it the elusive frontier.
  来自WSJ
• There have been large-scale military manoeuvres on the frontier.
  边境地区曾有过大规模的军事演习。
  来自《权威词典》
• 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。
  来自《权威词典》