A second cycle is the self-loop of Task 2, which USES activity form.

第二个循环是Task 2的自循环，它采用活动形式。

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With the popular application of self-loop well-flushing truck in water-injection well, how to properly use it becomes more and more important.

随着油田注水井自循环洗井车在各油田的推广使用，如何正确使用油田注水井自循环洗井车显得越来越重要。

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This urban farm, perhaps more appropriate for Dubai than New York, is intended to be cultivated by its own inhabitants, thus closing the loop of self-sustenance.

这个城市农场(或许建在迪拜比纽约更适合)，拟由居民自己种植和维护，从而完成城市中的自我循环。

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And there is a self-enforcing loop between the two, where helping others helps ourselves; and helping ourselves, in turn, helps others.

两者间有自我实施的循环，帮助他人就是帮助自己;,帮助自己继而帮助他人。

哈佛公开课 - 幸福课课程节选

There is a strange kind of nihilism in the president's approach, it's a closed, self-referential loop.

WSJ: Obama Is Playing a New Game

This creates a self-sustaining negative feed back loop as prices fall, produces cut back production, creating more unemployment, reducing demand, which increase deflationary pressures.

FORBES: American Political Economy Alters English Language