Cooking outdoors was once only a summer activity Shared with family and friends.

户外煮食曾经是夏日里一项家人和朋友之间的活动。

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And yet, as the new book Connected by Nicholas A. Christakis and James H. Fowler shows, we actually do choose our friends through proximity and Shared activity.

然而，正如尼古拉·a·克里斯·塔基斯和詹姆斯·h·福勒所写的新书《联系》(Connected)所言，我们实际上的确通过距离远近和共同的活动来选择我们的朋友。

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Let us first ask: what makes something - a substance or an activity - addictive? Is there a property Shared by all the things to which we can get addicted?

让我们先问一下：是什么——一种事物或者行为——导致了上瘾？它们之间是否存在着共同点？

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Parents geocache with their kids for the adventure and the excitement of discovering interesting places and enjoying a shared activity.

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It made it possible to look at the activity of other Web surfers on a shared Internet connection if they were on an unsecured site, which Facebook among other sites like Twitter are.

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According to the report, 19 of the 20 (all but Loopt) shared information with third parties in a way that could allow them to connect online activity to actual identity.

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