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1. The database management system is responsible for organizing and managing data in the database.
数据库管理系统负责组织和管理数据库中的数据。
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2. As a database administrator, I am responsible for maintaining and upgrading the database system.
作为数据库管理员，我负责维护和升级数据库系统。
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3. To ensure data security, we need to implement strict access controls and regular backups of our database.
为了确保数据安全，我们需要实施严格的访问控制和定期备份我们的数据库。