Gradually as the concentration of greenhouse gases goes down, Earth starts to cool again, and eventually you slip back into an Ice Age.

随着温室气体浓度的下降，地球开始再次变冷，最终又将回到冰河时代。

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Now you may be invited back to bid again and win the house you had your heart set on, perhaps because competitive bidders have bid low, too.

那么现在你可以再次出价并赢得这所你心仪的房子了——或许是因为原有的竞价对手现在开了更低的价格。

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You might experience a flipping back and forth, from one to the other, then back again, when you stare at the picture.

也许你凝视图像的时候，不断看到它从一个跳到另一个，然后再跳回来。

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And you get back to your office and look at the business card and you say 'Who was that again?

VOA: special.2009.09.14

And so what you want to do and again we'll come back to this later in the term, is something called regression testing.

却又出问题了,然后你想怎么办呢？,我们会在这学期晚些时候,讨论这个被称为回归测试的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选

It is a book that one of you will go back to time and time again and it will stick with you forever.

那是一本你们其中一人,会不断回顾的巨著,而且永世追随。

耶鲁公开课 - 政治哲学导论课程节选

"When you come down off the pill, you're back to reality again and you're really depressed and your whole body hurts and you want to do that pill again to get back up there, " Moore told the committee.

CNN: Senate panel probes so-called 'hug drug'

"The show runners that I know are willing to charge into the barricades over and over again, and you have to be willing to get back up again, " Moore said.

CNN: The uncharted journey of Ronald D. Moore

If you do pay in pounds, the merchant will charge you to convert the local currency into sterling and then charge you again to convert back to the local currency.

BBC: Travel money: When is the best time to buy?