边防的英文：
frontier defense

参考例句：
  • border guards
    边防卫士
  • That's the Frontier Defense Inspection Station.
    那是边防检查站。
  • The militiamen did much to assist the frontier guards' search for the enemy.
    民兵大力协助边防军嫂搜索敌人。
  • He tried to strangle a border policeman and steal his gun.
    他企图勒死一名边防警察并偷走他的枪。
frontier是什么意思：
n. 边界；边远地区；尖端
  • You are exploring the frontiers in science.
    你在探究科学的新领域。
  • Sweden has frontiers with Norway and Finland.
    瑞典与挪威和芬兰接壤。
  • We were turned back at the frontier.
    我们在边界那儿被赶了回来。
  • The frontier forces had to operate against the invaders.
    边防军不得不对入侵敌人作战。
  • Professor Field is devoted to the exploration of the frontiers of medicine.
    菲尔德教授致力于探索医学研究的新领域。
defense是什么意思：
n. 防御，防御工事；防御物；防御措施；辩护；（比赛中的）守方
v. 抵御，防御
  • (in a match) the defense
    守方
  • The defenses of the city must be strengthened.
    这个城市的防御工事必须加强。
  • He was the then secretary of Defense.
    他是当时的国防部长。
  • Offense is the best defense.
    进攻是最好的防御。
  • Attack is the best form of defense
    攻击是最好的防御

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