要知道黑洞里究竟是什么，我们需要有什么东西从视界里出来，并让我们用望远镜看到。
To know what's inside a black hole, we need something to come out from behind the event horizon, and reach us via a telescope.
这样我们发现黑洞视界附近的量子态密度变得有限，从而消除了砖墙模型中熵的发散而不需要采取任何不自然的截断。
Therefore, we find the quantum states density becomes finite near the horizon of black hole and the divergence of entropy in the brick wall model is removed without any unnatural cutoff.
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