If the merger idea is correct, lots of new material flowing in a single direction feeds a black hole, driving the spin faster one way.

如果融合理论是正确的，来自同一方向的大量新物质流入可以促使黑洞成长，从而使得按照一个方向高速旋转。

As the material coalesces to create a galaxy, some falls to the center and feeds the black hole there; it grows as its host galaxy does.

当这些物质聚在一起形成星系时，一些物质会落到星系中心，并在那里形成黑洞：它像它的宿主星系一样成长。