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While exhibitions on websites can look like the actual objects, there is nothing like seeing the real ones in the museum.

虽然网络展览也很真实，但没有什么比得上在博物馆里实地参观。

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But you see many more paper tigers than real ones.

但是还是纸老虎多一些。

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Let's be honest here, when we say experiments in the real world in Game Theory-- or the ones you read about in The New York Times-- the real world when it comes to experiments in Economics really means undergraduates at the University of Arizona.

坦诚地讲,不管是现实中的博弈实验,还是你们在纽约时报上所看到的,谈到现实生活中进行的经济实验,当属亚利桑那大学的本科生

耶鲁公开课 - 博弈论课程节选

Players value their online relationships as real ones and go to meetings and conferences.

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They caution, though, that there are important differences between virtual plagues and real ones.

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"Unfortunately I don't think we'll ever get to meet the real ones, " one visitor told CNN.

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