空难事故预测是航空安全评价和决策的基础。
The prediction of air disaster is the basis of aviation safety assessment and decision-making.
本文在属性集和属性测度理论基础上提出了属性综合评价和决策系统。
Based on the theory of attribute sets and attribute measure, attribute synthetic assessment system is presented.
这就需要我们在环境风险评价和决策中引入预警原则，并切实实施好这个原则。
Therefore, it requires us to introduce the precautionary principle(PP)and to solidly implement this principle in environmental risk assessment and decision-making.
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