In 1738, Daniel, trying to solve a problem in probability theory and the theory of gambling by use of the calculus, stumbled on the concept of the law of diminishing marginal utility of money.
在1738年，丹尼尔试图用微积分来解决一个概率论和赌博理论里的问题，无意间却发现了货币的边际效用递减法则的概念。
Large deviation theory provides a good method to calculus the probability of rare event, which will have great impact once it happens although its probability may be very small.
大偏差理论提供了一个很好的办法来计算小概率事件的概率，尽管这种事件发生的概率可能会很小，但是一旦发生将会产生巨大的影响。
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