Evolutionarily speaking, people in this age group are at a stage in which they can prepare to find a mate and start their own family while separating from parents and striking out on their own.

从进化的角度来说，这个年龄段的人正处于这样一个阶段：他们可以在与父母分开、自立门户的同时，为寻找伴侣和组建自己的家庭做准备。