...度都大于市场; 称为进攻型证券(aggressive security) β 称为保守型证券(defensive security) 29、总风险=系统风险+非系统风险 证券组合的 beta 等于组合中的各个证券 beta 值的加权平均 30、期权:定义
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security defensive system 安全防御体系
Defensive system for network security 网路安全防卫系统
security defensive 安全防御
information security defensive 信息安全防御
active security defensive system 主动安全防御体系
As each new defensive security measure is implemented, it will change the current security posture and subsequently the potential opportunity costs.
每当实施一种新的防御安全措施时,它将会改变当前的安全状况以及紧随其后的潜在的机会成本。
Security analysts are often called white hats, and white-hat analysis is the use of hacking for defensive purposes.
安全分析师通常称为 白帽(white hat), 白帽分析是为防御目的而使用的密码破解。
Before the assault they had used Google Earth to explore 3-d models of the target and determine optimal entry and exit routes, defensive positions, and security posts.
武装人员在袭击之前,利用“Google地球”制作了袭击目标的三维模型,设计了最佳的进出路径、防守位置以及安全岗位。
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