名词
中文翻译：防空演习
同义词：
['air defense exercise', 'air defense drill例句：1. The school held an air defense drill to prepare for a possible terrorist attack.（学校举行了一次防空演习，以准备可能的恐怖袭击。）']
例句：
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1. The school held an air defense drill to prepare for a possible terrorist attack.
学校举行了一次防空演习，以准备可能的恐怖袭击。
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2. During the air defense drill, everyone was required to wear their helmets and follow the instructions.
在防空演习期间，每个人都被要求戴头盔并遵循指示。
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3. The air defense drill helped us to identify potential hazards in our surroundings.
防空演习帮助我们识别了周围潜在的危险。