我被打断，思路中断了。

I was interrupted and lost my ___train ___of ___thought.

如果我们跟随史蒂文斯在书中的思路，他关于尊严的观点就变得非常清晰了。

Stevens's ideas on dignity become very clear if we follow his ___train ___of ___thought through the book.

演讲者的思路如此有逻辑，观众能轻松跟上。

The speaker's ___train ___of ___thought was so logical that the audience could easily follow it.