So if black holes are a thing, then white holes - which are black holes played backward - can also be a thing.

因此，如果黑洞是一个东西，那么白洞——也就是黑洞的逆演——也可以是一个东西。

The Role of Black Holes in Cosmic Evolution Far from being just destructive monsters, black holes play a pivotal role in shaping the universe.

黑洞在宇宙演化中的作用黑洞不仅仅是破坏性的怪物，它在塑造宇宙方面发挥着关键作用。

But astronomers believe that black holes play a part in the formation of galaxies As far as we know, every big galaxy has a black hole at its very center.

但是天文学家认为黑洞为星系的形成作出了贡献，现在我们知道，超大星系的正中央有黑洞。