Importing African cheetahs to the western United States could, in theory, put the pronghorn back onto its natural evolutionary trajectory according to these biologists.

从理论上讲，把非洲猎豹引进美国西部，可以让叉角羚重新回到生物学家所说的自然进化轨道上。

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Climate change sceptics claimed they showed scientists manipulating and suppressing data to back up a theory of man-made climate change.

气候变化怀疑论者宣称，这些电子邮件显示科学家们篡改和隐瞒了数据，以支持人为造成气候变化的理论。

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Zeigarnik went back to the lab to test out a theory about what was going on.

蔡加尼克回到实验室对这一现象进行测试看看会发生什么。

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It's crucial, as I say, and I'm going to be coming back to it, but it's just a point I want to make in passing about the nature of theory now.

这一点至关重要，而且我以后还会再次提到，但现在关于理论的本质我就谈到这里。

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Now, let's go back to a theory which has at least got the virtue of being very old, although hardly anybody believes it anymore.

现在,让我们再回去看一个理论,它的优势在于非常古老,虽然已经没人再相信它

耶鲁公开课 - 古希腊历史简介课程节选

After all, go back to the lock-in warriors about the soul theory of personal identity.

回顾我们讨论人格同一性的灵魂论,提到的关于战士的案例。

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Professor Jillian Birch, director of the Cancer Research UK's Paediatric and Familial Cancer Research Group in Manchester, said the results seemed to back the theory that some childhood brain tumours were linked to infection.

BBC: Cancer linked to measles and flu

So let me bring you back to the hellebore theory for a moment, and press you to say what you think of it?

FORBES: What Caused The Death Of Alexander The Great?

But it is always nice to have more than one line of evidence to back a theory up.

ECONOMIST: Some 68m-year-old evidence that birds are dinosaurs