现在有更多的证据表明，名人，尤其是职业运动员，对儿童的行为有多么强大的影响。

Now there's a lot more evidence of how powerful a celebrity—especially a professional athlete—can be in influencing children's behavior.

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目前的难题是在当地媒体更强大和更多样化的地方能做什么。

The dilemma is what to do in places where local media are stronger and more varied.

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道路上这张美国琼脂凝胶地图是不太现实的一面镜子，但他们可以帮助科学家在未来建立更多的强大的网络。

The “roads” on this agar-gel map of the U.S. may not quite mirror reality, but they could help scientists build more-robust networks in the future.

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