The main work and results in this paper include: 1. We give a short review on the customer churn analysis and related data mining methodology applications in customer churn.

论文的主要工作和成果包括：1。综述了客户流失分析以及数据挖掘的研究现状，论述了客户流失分析的相关问题。

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There are some methods for data mining, and then Rough Sets methodology is one of important methods.

进行数据挖掘的方法有许多，而粗集方法便是其中的主要方法之一。

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While data mining, as an advanced data analysis methodology, is an effective tool for the in-depth analysis of customer data.

数据挖掘作为一种先进的数据分析方法，是实现对客户数据进行深入分析的有效工具。

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