1. The demand for unrenewable natural resouces, such as petrol, steel etc was grow dramatically. 对于不可更新的天然资源，例如：石油、钢铁等的需求量火速大增。
2. Coal resource is an unrenewable and one-off resource, and therefore its industry chain and recycling economy are restricted. 煤炭资源是不可再生的一次性能源，由之延伸的产业链和循环经济也受其制约。
3. AbstractData warehouse(DW) is defined as a subjectforiened, compositive, unrenewable and variational dare sets along wth time, which suPPort enterprises or organizations tO make decision. 数据仓库是一个支持企业或组织决策分析处理的、面向主题的、集成的、不可更新的，随时间不断变化的数据集合。
