名词
中文翻译：区域防御
同义词：
['regional defense', 'regional protection', 'regional security']
例句：
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1. The military has been conducting zone defense exercises in the border region.
军队一直在边境地区进行区域防御演习。
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2. The government is implementing a new policy to enhance regional defense capabilities.
政府正在实施一项新政策，以提高区域防御能力。
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3. The city's defense system is designed to protect its citizens from potential threats within its own zone.
城市的防御系统旨在保护其公民免受潜在威胁。