In many important areas, from the obsidian industry to religious tourism, Teotihuacán's success and prosperity typified the classic positive feedback cycle.

在许多重要的领域，从黑曜石产业到宗教旅游，特奥蒂瓦坎的成功和繁荣是典型的正反馈循环。

youdao

Set up a positive feedback cycle for single-tasking focus and you'll reverse the years of training your mind has gotten to switch tasks. You'll get more important work done, and it won't seem hard.

当建立起正面的反馈循环机制，经过一段时间训练，你就能适应任务的转换，担当重要的工作，并战胜各种困难。

youdao

So long as the feedback is positive (an important qualification), the result is a virtuous cycle of increasing returns for the idea.

FORBES: What Makes an Idea a Meme?