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- undefended frontiers 不设防边界
- Sweden has frontiers with Norway and Finland. 瑞典与挪威和芬兰接壤。
- Everything is quiet on the frontier. 边境上一切安静。
- The car was turned back at the frontier. 汽车在边境处被拦住了。
- Our frontier guards held up under fierce enemy attack. 我们的边防战士在敌人猛烈进攻下巍然不动。
- The frontier ranges from the northern hills to the southern coast. 边界从北部山地一直延伸到南部海岸。
- The coast was undefended and lay open to attack . 该海岸未设防，易受攻击。
- The coast was undefended and lay open to attack. 该海岸未设防,易受攻击。
- The frontiers of medical knowledge are being pushed forwards as time goes on. 医学知识的新领域正随着时间向前推进。
- The frontier range from the northern hill to the southern coast. 边界从北部山地一直延伸到南部海岸。
- By pooling our talents and resources we can make space a new frontier of peace. 如果我们把才能和资源汇合起来，就能把太空这个尚未开拓的疆域变成一个新的和平疆域。
- The soldiers garrison the frontier. 战士们驻守边陲。
- Change cannot be held back by frontiers. 疆土边境不能阻止变革。
- Her land frontiers run for 15000 kilometres. 它的陆上边界线长进15000公里。
- Bombs and poison gas would rain down on undefended cities. 炸弹毒气弹纷纷投向那些没有防御的城市。
- We must show our passports at the frontier. 在边境我们必须出示护照。
- Professor Field was devoted to the exploration of the frontier of Medicine. 菲尔德教授致力於探索医学研究的新领域。
- National frontiers did not count at that time. 国界那时不重要。
- It's single undefended spot is its fleshy, armor-less underside. 它唯一没有防备的地方是它没有甲片保护的腹部。
- You are exploring the frontiers in science. 你在探究科学的新领域。
