I relapsed into silence, and followed a train of thought of my own.

我又陷入了沉默， 并遵循了自己的思路。

If you have a train of thoughts which would otherwise keep you awake one way of dealing with this is to block those thoughts.

如果你思绪万千睡不着觉，解决这一问题的一个方法就是阻断这些思路。

Knight stopped as if he had fallen into a train of thought, and Stephen looked with affectionate awe at a master whose mind, he believed, could swallow up at one meal all that his own head contained.

奈特停了下来，好像他陷入了一个思路，斯蒂芬充满深情地敬畏地看着一位大师，他相信他的思想可以在一顿饭中吞噬他自己头脑中的一切。