Mang nghĩa "ở trong máu rồi, cố hữu nó là như vậy, xưa đến giờ là vậy..."
=If a quality or talent is in your blood, it is part of your nature, and other members of your family have it too/if an ability or tendency is in, or runs in, someone’s blood, it is natural to them and others in their family
IELTS TUTOR xét ví dụ:
Diplomacy was in his blood: his ancestors had been feudal lords.
He has adventure in his blood.
It seemed to be in his blood.
Colors are in my blood, as they are closely related to my emotions and preferences.
It would be in his blood in minutes.
Psychic awareness ran in my blood.
His father and grandmother were painters too, so it's obviously in the blood.