名词
中文翻译：防空区
同义词：
['airspace', 'airdefense zone']
例句：
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1. Themilitary has established a stricter air defensearea for the city.
军方为该市建立了一个更严格的防空区。
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2. The airdefense area is designed to protect against enemyaircraft.
防空区的设计是为了保护免受敌方飞机的袭击。
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3. The air defense area isconstantly monitored by radar systems.
防空区不断受到雷达系统的监控。