blended family
noun/ˌblendɪd ˈfæməli/
/ˌblendɪd ˈfæməli/
(especially North American English)- a family that consists of two people and their children from their own relationship and from previous ones
混合家庭（成员包括夫妇、其子女及其各自过去关系中所生的子女）