From the study on value variance, we get some enlightenment: First, close connection and advance depending each other are the relation among society, value and college entrance examination policy;

从对价值观念变迁的研究中，我们 得到几点启示：第一，紧密联系、互动前进，是社会、价值观念、高考政策三者之间的关系；

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The variance of a random variable measures how far from the expected value its values typically are.

随机变量的方差衡量随机变量值与期望值偏离的程度。

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Expected value is good and variance is bad because that's risk; that's uncertainty.

期望值越高越好,方差就相反,因为方差代表着风险,也就是不确定性

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Expected value is good and variance is bad because that's risk; that's uncertainty.

期望值越高越好,方差就相反,因为方差代表着风险,也就是不确定性

耶鲁公开课 - 金融市场课程节选

We want a high expected value of returns, but we don't like variance.

我们希望收益的期望值较高,并且稳定

耶鲁公开课 - 金融市场课程节选

"The future of France in the family of great nations depends on our capacity for initiative - a value totally at variance with an enarque culture based on zero risk and suspicious of any idea of competition or power-sharing, " they said.

BBC: Call to close elite French college

Valuation becomes a matter of ratios of highly formalized GAAP earnings in relation to fluctuating prices adjusted by highly abstract notions of variance and value at risk.

FORBES: What Gold Sees, and Ben Bernanke Does Not