单词 | event horizon |
释义 | event horizonnoun Astronomy 1A notional boundary around a black hole beyond which no light or other radiation can escape.This causes space-time in their vicinity to be literally dragged around them in a gravitational vortex, forming a region around their event horizon called the ergosphere, in which it would be impossible to stand still....
1.1A point of no return: we’re nearing the event horizon of the presidential election...
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