...Extended approach one: the hierarchical reduction approach of RST to incomplete information system. This approach represents knowledge with complete and incomplete attributes layers, and then conduct reduction hierarchically at each layer. 拓展算法一：不完备信息系统的粗糙集分层递阶约简算法将属性分为完备属性层和不完备属性层，然后分层递阶约简。
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One approach for locating and snipping DNA strands involves "zinc fingers" - proteins that bind to DNA and can be linked together to recognise extended stretches of DNA with very high specificity.
一种定位和剪开基因链的方法叫做“锌指”——由基因链组成的蛋白质，它可以通过高特异性辨识到DNA的“接头”，并和DNA相互连接起来。
This mechanism lacks of flexibility for dynamic assignment of participant. This traditional approach is extended to a novel one which uses SQL-like scripts to define activity participants.
文章对这种传统的活动参与者定义机制进行了扩展，提出了一种利用SQL脚本来完成参与者定义的新方法。
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