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。

耶鲁公开课 - 新约课程节选

And you'll be working with obviously part of this class, Deb Levy but also with Deb Levy who is the, they had teaching fellow for the extension school.

而你们将显然参与到我们的课程中来，但也可以找，他是进修学校的助教。

哈佛公开课 - 幸福课课程节选