名词
中文翻译：Unknown
同义词：
['antiaircraft', 'antiaircraft missile', 'antiaircraft gun', 'air defense system']
例句：
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1. The army has developed an antiaircraft missile to protect its cities from enemy aircraft.
军队已经开发了一种防空导弹，以保护其城市免受敌机攻击。
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2. The antiaircraft gun was used during the war to shoot down enemy planes.
在战争中，防空炮被用来击落敌机。
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3. The air defense system is designed to intercept and destroy incoming enemy aircraft.
空气防御系统旨在拦截和摧毁来袭的敌机。