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茫茫宇宙之中,存在着这样一种极其神秘的天体叫“黑洞”(blackhole)。黑洞的物质密度极大,引力极强,任何物质经过它的附近,都要被它吸引进去,再也不
Among the vast universe, there is such an extremely mysterious object called “black hole.” The black hole has a great material density and a very strong attraction. Any matter passing near it must be attracted to it and never