比如说，爱抽烟的人总是聚在吸烟时聚在一起，这样一来，不同性别和种族背景的人就比较容易形成一个群体。

For example, people who smoke gather together wherever they can smoke; people of different gender and ethnic backgrounds tend to form communities.

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事实上，当人们聚在一起时，很可能会出现“群体极化”的现象：最初的倾向通过群体讨论会被夸大。

In fact people are likely to display group polarization when together: initial preferences actually become exaggerated by group discussions.

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