This is because black holes themselves do not emit or reflect any light, and they are too small and too far away to be imaged.
这是因为黑洞本身既不发射也不反射光 线，而且它们太小，并且太远，不能成像。
This is because black holes themselves do not emit or reflect any light, and they are too small and too far away to be imaged.
这是因为黑洞本身既不发射也不反射光 线，而且它们太小，并且太远，不能成像。
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