In most cases, the rational value of a commodity is best approximated by the average value that consumers assign it.

大多情况下，消费者为一项商品指定价格的平均值最接近这项商品的合理价值。

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This essay tries to analyze the attitude of the rational value of neo-classical literature in the 17th century in French based on the relationship between man and the world.

文章立足于人与世界关系的维度，分析了17世纪法国新古典主义文学的理性价值立场及其艺术得失。

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Rejecting low offers, he says, could be the result of a rational calculation about the value of fairness rather than an angry impulse.

他说，拒绝低的出价也可能是出于对公平价的理性计算而不是愤怒的刺激。

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Luckily for me (and regardless of what anyone else says, there is a lot of luck involved in angel investing), I have since had significant positive exits to companies like Kodak, CBS and Facebook, and the current value of my portfolio is approaching the 30% IRR that rational angels target.

FORBES: David S. Rose -- Father of Angel Investing in New York

Explaining what they do tick by tick on a continuous basis has as much value as trying to come up with a rational explanation why the ball landed on the 9 on the roulette table in Bellagio instead of 10.

FORBES: No Default As Long As The Fed Has A Printing Press

What about a political vision in which the individual is respected as a separate, rational, self-responsible person who finds value voluntarily choosing (or not) to engage with others personally, culturally, or commercially?

FORBES: Party Conventions Pit The Vision Of Reagan Versus The Whining Of Carter