社会单位：社会中的一个单位，可以是个体、家庭或群体等。
an organization regarded as part of a larger social group
同义词： unit
The family is a social unit.
家庭是社会的组成单位。
The family is the smallest social unit.
家庭是社会最小的单位。
The extended family is the basic social unit, headed by its eldest male member.
扩大家庭是最基本的社会单位，由最老的男性成员管理。
Not for nothing did he invoke the family, that elemental social unit in which we truly are responsible to one another and to future generations by law, by custom, and, ideally, in our hearts.
In a world where the largest social unit is the tribe, clan or what-you-will of a few hundred people, your neighbours and your other allies will normally look a lot like you, and act similarly.
But as the government says, the Social Exclusion Unit is not just about fighting social ills, it is also about creating better services for the individual and the community as a whole.