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我们已经知道,大质量的恒星在坍缩的过程中会变得如此之小,以至于在它的引力作用下,不管是光线还是别的任何东西都不能逃逸出来。这样的恒星就变成了一个黑洞。
We already know that a massive star becomes so small in the process of collapsing that under its gravitational influence, no light or anything else can escape. Such a star becomes a black hole.