Let's think about probability density.
让我们来考虑概率密度。
Think of it as a probability density plot.
把它看成是一个概率密度图。
The general expression of probability density of total cost is given.
给出了总费用弹性概率密度的一般表达式。
This is the probability density map, so we're talking about the square here.
这是它的概率密度图，我们看的是平方。
The general expression of joint probability density of total cost is given.
给出了总费用联合概率密度的一般表达式。
We know that it's a density, it's not an actual probability.
我们知道它是密度，不是概率。
We know that it's a density, it's not an actual probability.
我们知道它是密度，不是概率。
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