年轻的中产阶层男人和女人越来越渴望挑战他们家庭的期望，他们中许多人正自由选择自己的配偶，而非服从包办婚姻。
Young middle-class men and women have grown increasingly willing to challenge their families' expectations, with many now bidding to choose their own spouse rather than submit to an arranged marriage.
首先通过更新论证的方法得到罚金折现期望满足的积分-微分方程，然后推导拉普拉斯变换的表达式，并就索赔额服从指数分布的情形得到了罚金折现期望的精确表达式。
At first, we get the integro-differential equation satisfied by the expected discounted penalty function by using the method of renewal, and hence Laplace transform of it is derived.
本文进一步计算出股票价格模型的期望与方差，讨论了跳跃服从对数泊松分布时模型的无套利价格的下界。
We furthermore calculate the expectation and variance of random variable, and discuss the approximate value of no-arbitrage price when jump obeying poisson distribution.
本文进一步计算出股票价格模型的期望与方差，讨论了跳跃服从对数泊松分布时模型的无套利价格的下界。
We furthermore calculate the expectation and variance of random variable, and discuss the approximate value of no-arbitrage price when jump obeying poisson distribution.
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