或许您需要访问现有的库存控制系统、旧的客户数据库或基于大型机的安全性访问控制服务。
Perhaps you need to access an existing inventory control system, a legacy customer database, or a mainframe-based security access control service.
安全性也是一个问题；SimpleDB 的访问控制系统类似S3。
Security is also an issue; SimpleDB's access control system is similar to S3's.
构建安全、高效和公平的企业系统资源的统一访问控制系统，是目前一个重要的研究方向。
It is an important research direction to build a safer, efficient and fair access control system for business system resources.
构建安全、高效和公平的企业系统资源的统一访问控制系统，是目前一个重要的研究方向。
It is an important research direction to build a safer, efficient and fair access control system for business system resources.
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