The book entwines the personal and the political to chart the history of four generations of the family.

这本书交织描述了这个家族四代人的个人及政治的历史。

《柯林斯英汉双解大词典》

In fact, of the four generations Pew Research has data for, the Millennial generation does not cite work ethic as distinctive of itself.

事实上，在皮尤研究中心（Pew Research）四代人的数据中，千禧一代并没有将职业道德作为其独特之处。

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The house had belonged to her family for three or four generations.

这座房子属于她家已有三四代了。

《柯林斯英汉双解大词典》

In fact,he says, they have grown pepper in his family for the last four generations.

VOA: standard.2009.04.16

Most of the incentive-trust plans that Scroggin drafts are dynasty trusts generally spanning four generations.

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The West family owned a mountain farm property that had been passed down four generations.

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"I didn't want to extinguish the fire that has lasted four generations, " says Tsuchiya.

CNN: ASIANOW - TIME Asia