探测器在操作系统内核级上监视所有数据库事务，包括特权用户的事务，而不依赖于数据库审计日志。
The probes monitor all database transactions, including those of privileged users, at the operating system kernel level without relying on database audit logs.
审计信息可以存储在每个系统上系统管理员指定的本地文件中，也可以发送到远程系统以便进行集中的日志记录。
The audit information can be stored locally on each system in a file designated by the system administrator, or can be sent to a remote system for centralized logging.
系统必须处理三类外部实体：生产线上的称重机、工人的控制台、审计日志。
The system must deal with three classes of external entities: the weighing machines on the production lines, the worker's console, and the audit log.
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