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。

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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。

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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。

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But we usually mean by it the immediate, the nuclear family, with some extension.

但通常都是指直系亲属，核心家庭，少量分支。

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We also saw that men are becoming increasingly un-necessary and the nuclear family is likewise changing drastically.

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Progressive thinkers from Plato to Rousseau down to Marx sought to shrink the nuclear family in favor of the collective.

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What cooking demands is time, a far scarcer commodity for most American households today than 50 years ago thanks to the decline of the nuclear family and the normalization of commercial work for women.

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