LBAC is an implementation of Mandatory Access Control (MAC), which provides a reasonable level of security assurance for sensitive data stored in database.

LBAC是Mandatory Access Control (MAC)的一个实现，它为存储在数据库中的敏感数据提供了较高级别的安全保障。

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As an important component of high-level secure operating systems, the privilege control mechanism can provide an appropriate level of security assurance for the system.

特权控制机制是高安全等级操作系统中一个重要的组成部分，它能够提供系统恰当的安全保证级。

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The security model is the cornerstone for developing the security operating system, while the formal method provides high level assurance for the understanding of the security model accurately.

安全模型是安全系统开发的基石，而形式化方法则为准确理解安全模型提供了高保障依据。

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The manner in which that cooperation is undertaken will be determined by the president in conjunction with the government of Iraq, but it does not constitute a security commitment that rises to the level of a legally binding assurance which would, of course, have to be submitted to the Senate.

NPR: Negotiating America's Future in Iraq