名词
中文翻译：Unknown
同义词：
['safety', 'security', 'assurance', 'safety net', 'safeguard']
例句：
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1. The company's security measures aretop-notch.
该公司的安全措施堪称一流。
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2. The security guard was alert andattentive to the situation.
保安警觉并关注着情况。
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3. The security system is designedto protect against unauthorized access.
这个安全系统旨在防止未经授权的访问。