Pulsars have such extreme gravity because they're made of incredibly dense matter.

脉冲星之所以有如此强劲的引力，是因为构成它的物质非常致密。

If you try and learn a language, regardless of your age, synaptic connections are made, which ultimately create a denser grey matter and stronger white matter networks.

如果你试着学习一门语言，不管你的年龄如何，（你大脑的）突触连接就会建立起来，最终形成一个更密集的灰质和更强大的白质网络。

But what this cataclysmic eruption leaves behind might be even more remarkable: a ball of matter so dense that atomic electrons collapse from their quantum orbits into the depths of atomic nuclei.

一个如此密集的物质球，以至于原子电子从它们的量子轨道中都会陷入到原子核的深处。

But in the Crab Pulsar, the force of gravity is so extreme that the empty space inside the atoms is squashed out of existence, so all you're left with is incredibly dense matter.

但蟹云脉冲星上的引力过于巨大把它的原子都压成实心了，这样就形成了极其致密的物质。