对来自空中或外层空间的敌方飞行器进行斗争的措施和行动。包括建立各种防空体系，进行反空中侦察、反空袭作战，实施对空隐蔽、伪装、防护和消除空袭后果等。现代防空主要是对敌方各型飞机、巡航导弹、弹道导弹和军用航天器进行防御。它平时保卫国家领空安全，战时掩护国家转入战时体制，保卫国家重要目标，保障军队行动自由以及保卫人民群众的安全。防空对战争的进程和结局具有重大影响，在战略上有重要地位。
n. air defense
adj. antiaircraft
misc. antiaircraft defence
... anthropometry 人体计测学 antiaircraft (AA) 防空;空防 anti-aircraft artillery 高射炮 ...
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防空导弹 air-defense missile ; anti-craft missile ; SAMSurface to Air Missile ; SAM SITE
防空反导 air and missile defense ; air defense and missile defense ; air defense and anti-missile
防空体系 air defense system
国土防空型 territorial air defense
防空识别区 Air Defense Identification Zone ; ADIZ
防空导弹系统 air-defense missile system ; VL Mica Air Defence System ; antiaircraft guided missile system
边防海防空防 border, coastal and air defenses
地面防空部队 ground air defense forces
中华人民共和国人民防空法 Law of the People's Republic of China on People's Air Defense
A novel aerial defense fire system-Saturation Fire System which is used by high-shot weapon system is studied theoretically for the first time in this paper. This paper includes the following important aspects.1.
本论文以严谨的数学工具、明确的物理概念，研究了一种新颖的高射武器系统防空反导射击方式——饱和射击体制。
参考来源 - 饱和射击高射武器系统的命中概率研究The construction of people's air-raid defense alarming and communication system is closely related to the survival of the people, stability of the society and the development of the country.
人民防空警报通信系统的建设与人民的生存、社会的稳定以及国家的发展息息相关。
参考来源 - 防空警报遥控系统的研究与开发Such a large-scale and long-lasting practice of air defense was unprecedented in Chinese history of anti-aggression warfare.
如此大规模与长时间的防空实践,在中国反侵略战争史上尚属首次。
参考来源 - 战时陪都重庆防空论述First chapter thesis is stressed to introduce people's air defence engineering construction source, development course and our country and is carried on the necessity of city people's air defence engineering construction stage at present.
论文第一章着重介绍了人民防空工程建设出处、演变过程及我国现阶段进行城市人民防空工程建设的必要性。
参考来源 - 人防工程建设与城市可持续发展·2,447,543篇论文数据，部分数据来源于NoteExpress
北约防空的最大缺陷就是缺乏能够辨认敌友的识别系统。
The most serious deficiency in NATO's air defence is the lack of an identification system to distinguish friend from foe.
该城堡建于二战期间，是个用于抵御德国轰炸机的防空基地。
The castle was built during World War II as an air defense base against German bombers.
他们在一个防空洞里避难。
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