... 亲弟弟 biological brother 后弟弟 step brother *结婚 get married ...
2
?生物学上的兄弟
biological brother 生物学上的兄弟...
双语例句
1
My parents adopted me as an infant and went on to have a biological child — my brother, Jason — a couple of years later.
在我很小的时候,我父母收养了我,几年以后,他们有了自己的孩子—我的弟弟杰森。
2
"I have reason to believe, " she said, "you are the biological relative of a female born October 21, 1965, who is seeking medical information. Were you aware your brother fathered a child in 1965?