不適當的結合,不適當的婚姻
Misalliance \Mis`al*li"ance\, n. [F. m['e]salliance.] A marriage with a person of inferior rank or social station; an improper alliance; a mesalliance. A Leigh had made a misalliance, and blushed A Howard should know it. --Mrs. Browning.
misalliance n : an unsuitable alliance (especially with regard to marriage)