MSDA主要解决了多策略框架对细粒度访问控制和受控访问机制支持不足的问题，并把体系结构实施对原有系统结构和对系统性能的影响控制在较小的范围内。
MSDA not only solves the problem of fine-grained access control and controlled access mechanisms, but also minimizes the influence on the original system structure and system performance.
MSDA主要解决了多策略框架对细粒度访问控制和受控访问机制支持不足的问题，并把体系结构实施对原有系统结构和对系统性能的影响控制在较小的范围内。
MSDA not only solves the problem of fine-grained access control and controlled access mechanisms, but also minimizes the influence on the original system structure and system performance.
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