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You could pretend to be someone else, as if you were a character in a play.

你可以拌成另外一个人，就像在戏里扮演一个角色。

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Yet occasionally, when tour groups come through, someone will ask what role the trees might play as the nation addresses global warming.

偶尔有一些旅游团经过，有人会问到，国家致力于全球变暖问题时，树木充当了什么样的角色。

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Once envisioned as someone who could play a mix of quarterback, running back and punt protector, Tebow never found much of a role with the Jets, and his use in the "Wildcat" package failed to make much of an impact.

WSJ: New York Jets: Denard Robinson, Future Jet?

But as for what constitutes vision, a Bangladeshi villager logging on to play Tomb Raider in real time at the same speed as someone from Soho, be it Hong Kong, New York or London, makes a pretty compelling case.

CNN: ASIANOW - TIME Asia | Asia Buzz: NOW or Never!

Memory also appears to play a role in imagining what someone else might be feeling, known as theory of mind, which is helpful in deciding how to behave in unfamiliar social situations, such as going to a party with a new group of friends or starting a job.

WSJ: Memory: Research Finds Links Between Recall, Future Planning