The disadvantage is that if the federation is corrupted, few safeguards prevent an unauthorized user from gaining access to controlled information.

缺点在于，如果联合被破坏，很少有防护措施来防止未经授权的用户获得对受控信息的访问。

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You are allowed controlled access to the host system's hard drive in the event you need to offload pertinent data from an otherwise "dead" machine.

当需要从一台系统已经 “死亡” 的机器上导出资料时，就可以使用它来受控地访问主机系统的硬盘。

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Rational ClearCase is a comprehensive solution that provides integration with design, development, build, test, and deployment tools for controlled access to software assets across the full lifecycle.

Rational ClearCase是为跨整个生命周期的软件资产的受控访问提供设计、开发、构建、测试，及部署工具的集成的全面的解决方案。

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