名词
中文翻译：外部空气防御
同义词：
['outer space defense', 'outer atmosphere defense']
例句：
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1. The outer space defense system is designed to protect our planet from harmful asteroids.
外太空防御系统旨在保护我们的星球免受有害小行星的侵害。
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2.The outer atmosphere defense measures are being implemented to reduce the impact of global warming.
正在实施的外大气层防御措施旨在减少全球变暖的影响。
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3. The outer space defense technology has advanced significantly in recent years.
近年来，外太空防御技术取得了显著进步。