她对家族谱系很感兴趣，花了很多时间研究祖先的传承。

She's fascinated by family ___genealogies and spends hours researching her ancestors' lineage.

他花了好几个月研究家族谱系，追溯到了16世纪的祖先。

He spent months studying ___genealogies and traced his ancestors back to the 16th century.