求翻译：目前，防灾减灾工作逐渐从被动救灾转化为主动预防的趋势，自然灾害衍生事件危机预警就是在分析历史数据的基础上，通过数据挖掘技术，从海量的数据中发现有用的信息，为今后及时正确的处理类似衍生事件提供科学的依据和有效的解决方案。是什么意思？

Currently, disaster prevention and relief work gradually transformed from passive to active to prevent the trend of natural disasters, early warning is derived from events in the analysis of the crisis on the basis of historical data through data mining, data from the mass of useful information was

At present, disaster prevention and mitigation work was gradually from passive disaster prevention initiative to transform the trend toward natural disaster, derivative events in early warning of a crisis that is based on the analysis of historical data, and data mining technology, from the sea thro

At present, the disaster prevention disaster reduction work gradually transforms from the passive disaster relief primarily moves the prevention the tendency, the natural disaster derivation event crisis forewarns is in the analysis history data foundation, through the data mining technology, from t

At present, disaster prevention and disaster reduction work moving from passive response into a proactive trend derived event warning is in analysis of natural disasters on the basis of historical data, data mining techniques, find useful information from the huge amount of data, right in time for t

At present, disaster prevention and disaster reduction work moving from passive response into a proactive trend derived event warning is in analysis of natural disasters on the basis of historical data, data mining techniques, find useful information from the huge amount of data, right in time for t