血缘关系

例句：

1. 1. The family has a long history of bloodline connections.
   这个家族有着悠久的血缘联系。
2. 2. He is distantly related to the royal family.
   他与皇室有远亲关系。
3. 3. The term "bloodline" refers to the genetic connection between parents and their offspring.
   “血线”一词指的是父母与其子女之间的遗传联系。