防空的英文：
anti-aircraft defense

参考例句：

IW can be used to blind air defense target acquisition systems, nullifying the combat power potential of those weapons
信息战可用于迷盲对方防空目标搜索系统，从而剥夺那些武器的战斗潜力。

CaD = Civil air Defense
(美国)市民防空;民防防空

This weapon fires anti-aircraft missiles.
这种武器是发射防空导弹的.

Bomb-proof shelter( for submarines)
(潜艇用的)防空隐蔽坞.

Our air defense forces got down a number of enemy aircraft
我们的防空部队击落了一些敌机。

Our air defence forces accounted for two enemy aircrafts
我们的防空部队击落了两架敌机。

Air- raid warnings were sounded and thousands of people went into special air-raid shelters.
空袭警报响了，成千上万的人进入了专设的防空掩体里。

A Cambodian man passes a rusting antiaircraft gun.
一个柬埔寨人路过一架生锈的防空机枪。

Vehicles, modern tanks, and anti-aircraft equipment were critically short
战车、新式坦克及防空器材均甚缺乏。

"They were first used in combat in World War I, when field artillery was converted to antiaircraft use."
第一次世界大战中首次使用，将野战炮改装成用于防空的炮。

anti是什么意思：
n. 反对者；持反对论者
adj. 反对的；持反对态度的

There was an anti-racist demo.
发生了一场反种族主义示威。

They disseminated anti-French propaganda.
他们散布反对法国的宣传资料。

Anti corruption situation is still austere.
反腐败形势依然严峻。

aircraft是什么意思：
n. 飞行器，飞机

aircraft in the pattern
起落航线上的飞机

a device on an aircraft for carrying bombs.
飞机上用来装载炸弹的装置。

a toy aircraft kit
组装玩具飞机

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。