So first word we have is immediate family or a nuclear family.

第一个词是直系亲属，或者核心家庭。

Now a lot of people do not use the word nuclear family so much.

现在很多人不常用核心家庭这个词。

So they bought a nice house at the end of the cul-de-sac...and started their nuclear family.

所以他们在小路尽头买了套不错的房子过上了普通家庭的生活。

Another term for this is nuclear family.

另一个术语是核心家庭。

So it's not a nuclear family, then?

- 那么这不是一个核心家庭吗？

We won't just have nuclear or traditional families coming.

我们不会只有核心家庭或传统家庭到来。

In the past, most American families were what we call " nuclear families."

过去，大多数美国家庭都是我们所说的“核心家庭” 。

The " nuclear family" refers traditionally to the father, the mother, and the children.

“核心家庭” 传统上指的是父亲、母亲和孩子。

The nuclear family has been the basis for our cultural stories and our laws.

核心家庭一直是我们文化故事和法律的基础。

The nuclear family is actually a relatively new development.

核心家庭实际上是一个相对较新的发展。