According to classical theory, at the boundary of a black hole-the so-called event horizon-light can no longer escape.
在经典理论中，在黑洞的边界，即通常所称的事件穹界，光是不能逃逸的。
To be sucked in by a black hole, you need to reach its event horizon, the one-way boundary beyond which nothing can escape.
要被一个黑洞吸入，你必须抵达它的视界，即：超过这个边界任何都无法逃离的单程边界。
In the distant horizon where nature and human civilization meet, the boundary between science and arts vanishes.
在那遥远的天际，自然与人类文明相遇，而科学与人文艺术间的界限也变得模糊。
In the distant horizon where nature and human civilization meet, the boundary between science and arts vanishes.
在那遥远的天际，自然与人类文明相遇，而科学与人文艺术间的界限也变得模糊。
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