高级文明可能会安全的生活在黑洞之内而不被外界所察觉。
"Advanced civilizations may live safely inside the black hole without being visible from the outside".
根据一项新理论，行星，甚至高级生命，理论上可能会存在于黑洞之内。
Planets and maybe even advanced life could theoretically exist inside a black hole, according to a new theory.
这些东西的密度是那样大，以至于在它们的势力范围——也就是黑洞表面——之内，任何东西，甚至光线，都不能逃离。
These object are so dense that nothing, not even light, escapes once inside a sphere of influence known as an event horizon.
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