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1·Think of it as a probability density plot.

把它看成是一个概率密度图。

2·So, again we can use these probability density plots, which are just a plot of psi squared, where the density of the dots is proportional to the density, the probability density, at that point.

同样的我们可以利用这些概率密度图，这是psi的平方的图，这里面点的密度，正比于概率密度。