A+黎明前的黑暗
Mixed 即可,不用带blood。He is mixed Chinese and American.他是中美混血。或 His mother is Chinese and his father is American.他的母亲是中国人,他的父亲是美国人。

丸子的小雕
混血儿[hùn xuè ér]hybrid; a person of mixed blood; mixed-blood; mustee; half-breed例句他是英美混血儿。He was born of Anglo-American parentage.