biological mother

基本解释

My biological mother later found out that my mother hadnever graduated from college and that my father had never graduatedfrom high school.
但是我亲生母亲随后发现，我的养母从来没有上过大学,我的养父甚至从没有读过高中。
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Yet here she was in her doctor's office in the US with the baby's biological mother, both brought together by a terrible error at a fertility clinic.
然而她这会儿和孩子的亲生母亲一起坐在她的美国医生的办公室里，她们两个被这个生育诊所的一个严重错误绑在了一起。
But the similarity points up the difference: in Boy, the woman is not in fact the biological mother of the elder boy, and the family is insecure and peripatetic, lacking a permanent home.
不过这种相似性凸显了两者的差异：在《少年》中，那位女性实际上并非两个孩子中年长者的亲生母亲，而这个家庭也并不稳定、四处飘零、居无定所。

The household structure of a Roman household was this-- and I say "household," because our word "family," which we usually take to mean the biological family: the father, the mother, the children, maybe the grandchildren, maybe the extended family.
罗马人的家户结构是。。。,我用“家户“是因为“家庭“,通常是指有血缘关系的亲人：,父亲，母亲，孩子，可能还有孙辈，大家庭。
耶鲁公开课 - 新约课程节选

My biological mother was a young, unwed college graduate student, and she decided to put me up for adoption.
FORBES: Steve Jobs' 2005 Stanford Commencement Address