名词
中文翻译：Unknown
同义词：
['air defense', 'air defense operation例句：1. The air defence system is designed to protect against enemy aircraft.（防空系统旨在保护免受敌方飞机攻击。）']
例句：
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1. The air defence system is designed to protect against enemy aircraft.
防空系统旨在保护免受敌方飞机攻击。
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2.During the air defence action, the pilot had to make split-second decisions.
在防空行动中，飞行员必须做出瞬时决策。
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3. The air defence action was a success, preventing an attack on our city.
这次防空行动成功，阻止了对我们城市的袭击。