A secondary group entails two or more people who are involved in an impersonal relationship and have come together for a specific, practical purpose.

第二群体指的是两个或两个以上的人，他们处于一种非个人的关系中，因一个特定的、实际的目的走到一起。

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For example, one group of Japanese and American researchers showed people two squares of different sizes, one of which had a line inside in.

一个由日本以及美国的研究人员组成的小组给志愿者看两个不同大小的正方形，其中一个中间有条线。

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For example, if you are in a big group, it is best if only one or two people go to buy the drinks.

譬如说，你们若是团体前往，那最好是一个或两个人前去买酒。

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If only two people sign up for a group class, the class will be canceled 12 hours beforehand.

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After two and a-half years, the people in the exercise group were slightly less likely to be hospitalized for any cause or for heart failure.

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