Given this, pay special attention to the use of the Optional attribute, which can quickly lead to size escalation.

考虑到这一点，对于可选属性的使用要特别加以注意，因为它将导致数量的急剧膨胀。

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Simplification of Decision tables in Roouh set is order to lead decision rule or categorised rule at the least on the basis of the least condition attribute and minimum redundant attribute value.

粗糙集中决策表约简也就是以基于最少的条件属性和最小冗余的属性值导出最少的决策规则或分类规则。

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Geological environment have double attribute of resources and calamity. Unreasonable exploitation of resources, will lead to negative environmental effect.

地质环境具有资源与灾害的双重属性，不合理的开发利用将引发环境负效应，其影响具有扩散性与延滞性。

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