At thousands of weight loss camps across the country, women like Yao were the primary target group.

在全国数千个减肥训练营中，像姚女士这样的女性一直是主要目标群体。

Black mothers like Shalon remain the primary group for maternal mortality.

像沙龙这样的黑人母亲仍然是孕产妇死亡的主要群体。

Because in my family, reading was the primary group activity.

因为在我的家庭里，阅读是主要的家庭活动。

But it also helps you differentiate kinds of groups, specifically between primary and secondary groups.

但它也可以帮助您区分不同的群体，特别是主要群体和次要群体。

Primary groups are small and tightly knit, bound by a very strong sense of belonging.

初级群体规模小，联系紧密，被强烈的归属感所束​​缚。

Family and friendship groups are primary groups.

家庭和友谊团体是主要团体。

In fact, secondary groups can become primary groups over time, as a set of coworkers spends time together and becomes a primary group of friends.

事实上，随着时间的推移，次要群体可以成为主要群体，因为一群同事花时间在一起并成为主要的朋友群体。