Mail Policy文档可以进一步细化设置，单个的用户参数设置同样也可以。
Mail Policy documents can further refine the Settings, as can individual user preferences.
Notification Manager查询用户参数设置并基于这些选择发送通知。
The notification Manager queries the user preferences and sends out a notification based on these choices.
关联规则挖掘是一项高度交互的任务，用户通常需要尝试多种参数设置才能达到理想的结果。
Association rule mining is a highly interactive task, and users usually have to try many different parameter Settings to achieve the desired result.
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