表達 to have something in someones blood 或 be in someones blood 的意思是 某人的能力、天分或特質是遺傳的，也就是俗話說的 天生的。譬如，一家人當中假如有很多成員都從事一類工作或擁有同一種天分，那就能說這項技能是他們家族遺傳的，即 in their blood。

例句

Being a baker1 is in my blood our family has owned a bakery for many generations.

我骨子里就是個糕點師。大家家經營面包房已經好幾代了。

Art is in my blood my mother was a painter and her father was a sculptor2.

我的藝術細胞是與生俱來的。我媽媽曾是一名畫家，她爸爸曾是一名雕塑家。

People in every generation of Petes family have been football players its in their blood.

彼得家的每一代人都是足球運動員。他們天生就是這塊料。