Think of some things that go to and fro.

想想那些来回往复的东西。

Sunday, we start the cycle all over again.

周日 再开始循环往复。

And it's a cycle that goes around.

这就是一个循环，循环往复。

The characters are barely there. The dialogue goes in circles.

也几乎没有人物 对话循环往复。

And so the cycle spirals downward until you're both gone.

就这样循环往复，直到你们都消失。

And the structure of the work becomes as cyclical as life itself.

工作的结构就像身一样循环往复。

No more powerful first experiences and life repeats itself over and over.

没有更强大的初体验，循环往复。

And so on and so on and so on, made you day in an upward spiral.

往复循环，你这天就好。

And the cycle continues by refilling the nursery.

如此循环往复，苗圃里的苗就来多。

This in turn provokes more exits, and so on.

这反来又引发更多的离职，循环往复。

But if it takes off, it could help close the loop on trash.

但如果这成功地启动了，它将有利于切断垃圾的往复循环。

Evolution, in fact, is a constant back and forth between the environment and its inhabitants.

事实上，进化是环境和其居住者之间的一种不断往复的程。

But then you've got to go all the way to those classes, do the classes, come home again.

但是然后呢你需要去参加课程，然后回家，循环往复。

However, there won't actually be any changes, continuing the cycle of mistreatment and manipulation.

然而，实际他们上不有任何改变，而是继续对你施行虐待和操纵，循环往复。

When we help ourselves, we help others. And so on and so on. So they were pro-social.

当我们帮助自己时在帮助他人 循环往复 所以他们都是利社者。

The 14th-century historian Ibn Khaldun believed that history occurs in cycles over four generations.

14 世纪的历史学家伊·赫勒敦认为，历史在四代人之间循环往复。

For scientists, the inter-connected web-like filaments offer a clue as to the nature of life itself.

对于科学家来说，这种相互关联、往复循环的结构也是命的质。

After it came to Earth, that water has been cycling through rocks, air, animals, plants and back again.

在它到达地球后，水在岩石、空气、动物、植物中循环往复。

And then I messaged him on Twitter and now we've had a back and forth on Twitter.

然后我在 Twitter 上给他发了信息，现在我们在推特上往复交流。

And the people looked up from their day-to-day tasks, their day-to-day jobs and their day-to-day masks.

人们从日复一日的任务，周而复始的工作以及循环往复的口罩中抬头观望。