Because sometimes the value of a combination is different then the value you would get by just thinking about each one of the parts in isolation and then adding them up.

因为有时一个组合的价值会不同,那么你得到的价值是只单独考虑每一部分,然后把它们相加所得。

耶鲁公开课 - 死亡课程节选

You might ask, what's the value of that entire combination?

你可能会问，这整个组合有何价值？

耶鲁公开课 - 死亡课程节选

is two, 10% it means that if the market goes up 10% in value, the stock tends to go up 20% in value and so on.

当β值等于2时，If，β,表明若市场组合增值，股票价值就增长了20%，以此类推。

耶鲁公开课 - 金融市场课程节选

But I want to pause for a moment and note that this assumption that the way to think about the value of the combination as just a matter of adding the goodness of life and the badness of death and just summing them that way-- that may not be right.

但我想暂停一会并指出,这个用加上生命的好处,和死亡那个的坏处然后求和的方式,去考虑这个组合的价值的假设-,可能并不是正确的。

耶鲁公开课 - 死亡课程节选