直系の

(1)in a straight unbroken line of descent from parent to child; "lineal ancestors"; "lineal heirs"; "a direct descendant of the king"; "direct heredity"

(2)親から子供への真っ直ぐな連綿な血筋

(1)lineal ancestors

(2)直系の先祖

(3)lineal heirs

(4)直系の相続人

(5)a direct descendant of the king

(6)王の直系の子孫

(7)direct heredity

(8)直接的な遺伝