First of all, they were dying in such numbers; p was so high that it was expensive.

首先,他们死亡的概率如此之大,以至于保费会非常高

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It's a table showing the probability of dying at each age, for each age and sex.

这个图表反映了两性在不同年龄段中,死亡的概率

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So, they started to do collecting of data on mortality and they developed something called actuarial science, which is estimating the probability of people living.

他们开始收集死亡率的数据,并且发展出精算学,用来估算人在各年龄段死亡的概率

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