blood relation

音标发音

An exaggeration is a blood relation to falsehood and nearly as blamable.
夸张是谎言的血亲，应同样受到责备。
The Indian organ transplantation rules bar government hospitals from conducting kidney transplants if the donor has no blood relation to the patient.
器官移植法禁止政府医院为没血缘关系人士移植肾脏。
blog.sina.com.cn
Attack of the Clones conclusively establishes that these two characters have no blood relation, and thus Obi-Wan's brother is an as yet unexplored character.
《克隆人的进攻》最后确定这两个人物没有血缘关系，这样，欧比-万的兄弟仍是一个尚未发掘的人物。

And there was another group that said, no, it should be somebody - a blood relation of the prophet.
NPR: Early Divisions at Root of Sunni-Shia Conflict
It also found little relation between doctor supply and the odds of getting basic tests for cholesterol or blood sugar and and eye tests in diabetics.
FORBES: Are Doctors Too Disorganized?

A blood relation or blood relative is someone who is related to you by birth rather than by marriage.