An algorithm based on rough set theory for extracting rules from data class by class is proposed.

提出一种基于粗糙集理论的分类别进行规则抽取的算法。

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A summary for all objects on the heap is given first, then the statistics are broken down class by class.

首先给出堆中所有对象的一个总结，然后分别是各个类的统计数据。

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Yet despite the muddle over what the markers of class are these days, 71% of those polled by YouGov still said they found it very or fairly easy to figure out which class others belong to.

然而，尽管这些日子里人们对阶级的标志是什么还很困惑，但在 YouGov 的民意调查中，71%的受访者仍然表示，他们发现要弄清楚其他人属于哪个阶级是非常或相当容易的。

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Dewey said the Ninth Circuit allowed the plaintiff lawyers to sidestep a number of onerous provisions of class action law by certifying the class under a provision providing for injunctive relief.

FORBES: Supreme Court Takes On Massive Wal-Mart Discrimination Case

At stake are two political traditions: the old, working-class machine politics personified by Mr Martinez, and a middle-class reformist trend represented by Dade County's mayor, Alex Penelas.

ECONOMIST: Florida politics

This year, visitors are delighted to be returning to Bethlehem, where they can send franked letters by first class or by air mail.

BBC: Bethlehem post attracts festive flock