My cousin is not part of my nuclear household.

我的堂表兄弟姊妹并否则核心家里成员的一部份。

youdao

In the 1910s-20s, it was entrepreneurs like these who created the automobile and aerospace industries, household technologies for the new, urban nuclear-family middle class, and so forth.

FORBES: Entrepreneurs are the New Labor: Part III

To take one example, the average household's energy bill is projected to rise by hundreds of pounds by 2020 to fund the nuclear-power stations, wind turbines and power cables needed to keep the lights on and carbon emissions low.

ECONOMIST: Infrastructure