名词
中文翻译：团体防御
同义词：
['collective defence', 'collective defense']
例句：
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1. The group defence system is designed to protect the public from harm.
这个集体防御系统旨在保护公众免受伤害。
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2. The government has implemented a new policy to strengthen collective defence.
政府已经实施了一项新政策来加强集体防御。
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3. The group defence mechanism was put into place to prevent future attacks.
为了预防未来的攻击，已经建立了集体防御机制。