但计算群体的平均概率要比计算个体的概率容易得多。

But calculating the average probability for a group is much easier than calculating the same probability for any individual.

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当然，我可能会输掉赌注，但是根据平均概率法则，我不会输。

Of course I may lose the bet, but according to the law of average, I will not.

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图15 .通过较大近缓存或者关联路由，逐渐增加近缓存命中的概率，可以减少平均数据访问时间。

Figure 15. Increasing the probability of a near-cache hit, either through larger near caches or affinity routing, reduces the average data access time.

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