Markets might be undermined by what Nassim Taleb, an author, has described as a “black swan”—an event with a small probability of happening, but a big impact if it does.

市场有可能被作家塔雷伯所描述的“黑天鹅”（发生几率很小，但可造成重大影响的事件）所击垮。

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The small probability event has a wide range of applications in daily life.

小概率事件在日常生活中有着很广泛的应用。

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The more the small probability events happen, the more the impact to text categorization results.

小概率事件发生的情况越多，对文本分类的结果影响也就越大。

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And if we go ahead and square that, then what we get is a probability density, and specifically it's the probability of finding an electron in a certain small defined volume away from the nucleus.

我们得到的是，一个概率密度，它是，在核子周围，某个很小的,特定区域,找到电子的概率,所以它是概率密度。

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So, the probability that the whole city burns down is infinitesimally small, right?

在这样的假设下,整个城市都被烧掉的概率,是非常非常小的

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But it also says there is a small probability that the true number is much higher.

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All four appear to have the potential, however small the probability, of achieving outsized 10-20x returns should the deal hit all the downstream milestones.

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Typically, in a variation of the Allais experiment, subjects are asked to consider two different lotteries one with a big probability of winning a small prize and another with a smaller probability of winning a big one.

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