与黑洞相类似，在物质被挤压得非常紧密，以致时空的曲率变得非常大，连光线也不能从中逸出时，黒弦就会被创造出来。
Like black holes, black strings would be created when matter is squished so dense that the curvature of space-time becomes so large that even light cannot escape.
不过当密度、度和曲率到达某个弦论所容许的最大值时，这些量会反弹而开始变小。
But when the density, temperature and curvature reached the maximum values allowed by string theory, these quantities bounced and started decreasing.
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