您要查找的是不是：
- Alaska Defense Frontier 阿拉斯加边防线
- That's the Frontier Defense Inspection Station. 那是边防检查站。
- Alaska was once possessed by Russia. 阿拉斯加一度曾是俄国的领土。
- That is the Frontier Defense Inspection Station. 那是边防检查站。
- The forest will act as a defense against desert dust. 森林能起防御沙漠灰沙的作用。
- Many heroic men and women have died in defense of liberty. 许多英勇的男男女女为捍卫自由而牺牲。
- 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。
- They had a dogged defense of the city. 他们对城市进行了顽强的防守。
- 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。
- They are repairing the defense works. 他们正在修防御工程。
- The accused has the right to defense. 被告人有权获得辩护。
- One thing that Russia does have is endless space, and the lack of apparently defensible frontiers actually becomes a defence in itself. 俄国的眼界开始向国界之外看去，望向世界上最好的理念，文化和力量。
- Alaska is at the western extremity of North America. 阿拉斯加在北美西部的尽头。
- The climate in Alaska is a far cry from that of Florida. 阿拉斯加与佛罗里达的气候相差甚远
- ARPANET started by the US Dept. of Defense for research. 美国国防部建立了阿帕网，作研究用。
- 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。
- She's on attachment to the Ministry of Defense. 她现在隶属于国防部。
- The defense was overwhelmed by superior numbers. 防守被优势的兵力摧垮了。
- She spoke up in defense of her political beliefs. 她为她的政见力辩。
