In some New Guinea societies, the nuclear family is not the unit that eats together.

在新几内亚的一些社会中，核心家庭并不是一起吃饭的单位。

For example, in some societies, the nuclear family is the unit that regularly eats together.

例如，在一些社会中，核心家庭是一个经常一起吃饭的单位。

One theory is that bipedality evolved in conjunction with the nuclear family: monogamous parents cooperating to care for their offspring.

有一种理论认为，两足动物的进化与核心家庭有关：一夫一妻制的父母合作照顾他们的后代。

The nuclear family, despite its flaws, remains a sought-after model.

这种经典的家庭模式，尽管存在着各种缺陷，但依然饱受欢迎。

The children stay in the nuclear family until they grow up and marry.

孩子们一直生活在核心家庭里，直到长大结婚。