Listing 5 shows the results of migrating down and then back up.

清单5显示了向下迁移然后回退的结果。

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Does it actually come down and then back up without going to the left or to the right and without making an Angle?

有可能往下然后往回来，并且不偏不倚，也没有形成一个角吗？

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She woke up briefly and then went back to sleep.

她醒了片刻又睡了。

《牛津词典》

A robot would then pick up rocks and soil, and send them back to earth for testing.

VOA: special.2010.05.25

And then he goes back to hell and then back up to heaven -goes back and forth between these two rhythmically very different concepts.

然后它回到了地狱,接着又升到了天堂,在这两种节奏非常不同的概念之间,来回往复

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At that stage we can merge these, and then take this down, do the division merge and bring them back up.

在那里做一次分解，做到这步时，我们可以把这些进行合并，然后把这个拿下来,做分解合并过程后再把它们拿回去。

麻省理工公开课 - 计算机科学及编程导论课程节选

Passengers carrying luggage had to clamber down ladders on to the tracks and then back up on to the rescue train that arrived alongside.

BBC: Delayed passengers arrive at St Pancras

If you slam the ropes down with enough force, it will produce a wavelike effect that will travel down the ropes and then back up again.

WSJ: What's Your Workout: From a Ball and Basket to a Stick and Some Ice

The forum was taken down and then came back up.

CNN: The Internet war