The infalling matter that emits X-rays does not fall into the black hole at a steady rate,but rather more sporadically,which causes an observable variation in X-ray intensity.

 
  • 发出X辐射射线的下陷物质并不是以恒定的速率落向黑洞,而是偶然发生的,这导致了一种可以被观察到的X射线辐射强度的变化。
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