blood lineage

基本解释

Nobles may be fat merchants sitting behind the thick walls of a granted keep or men born of noble blood, whose lineage spans thousands of years.
贵族也许是个端坐在采邑要塞厚厚城墙后面的大腹便便的富商，也有可能是绵延数千年家族血脉的后裔。
trow.cc
Basically, it is a social estate system based on the patriarchal system and consistent with genetic connection or blood lineage, reflecting the obsession of hierarchy of the then society.
它的基本精神反映了建立在宗法关系之上的、与宗族血缘亲疏关系相一致的社会等级观念。
gyh2005gerry.blog.163.com
He boasted a lineage of pure blue blood.
他夸耀自己有纯贵族血统。

They are the cultural and direct blood lineage of the Chinese cultural and historical legacy.
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