名词
中文翻译：外部安全
同义词：
['external security', 'perimeter security']
例句：
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1. The company's outsidesecurity team is responsible for monitoring the perimeter.
公司的外部安全团队负责监控边界。
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2.The new security measures are designed to protectagainst external threats.
新的安全措施旨在抵御外部威胁。
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3. The company has implemented stricterrules to ensure maximum outside security.
公司已实施更严格的规则，以确保最大程度的外部安全。