在这种情况下，决策制定者既不能肯定它的结果又不能对概率做出合理的估计。
A situation in which a decision maker has neither certainty nor reasonable probability. estimates available.
该方法被应用到估计华北地区地震发生的概率密度。
The method is applied to estimate the seismic occurrence rate in North China region.
实验目的在于利用人们过高估计小概率事件的倾向。
The idea is to make use of people's tendency to overestimate small probabilities.
把单立柱平台作为串连系统来考虑，从而求得体系可靠概率的区间估计。
The range of system reliability considering the platform as series mode is achieved.
把单立柱平台作为串连系统来考虑，从而求得体系可靠概率的区间估计。
The range of system reliability considering the platform as series mode is achieved.
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