Ms Rose complains that she and her half-sibling Adam have suffered an identity crisis from knowing nothing about their biological father.

罗斯说，她和她同母异父的兄弟亚当因为对生身父亲一无所知而陷入身份危机。

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The 42% of Americans who have at least one step-relative typically feel a stronger sense of obligation to their biological parent, child or sibling than to their step-relatives, the Pew survey says.

约42%的美国人至少有一个继亲，皮尤的调查结果显示，这些人往往觉得，自己对亲生父母、亲生子女或亲兄弟姐妹的义务感，比对继亲的义务感更加强烈。

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Adopted children had roughly double the risk of drug abuse if their biological full- or half-sibling had similar issues.

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Another example occurred between 2001 and 2003, when a biological to treat anemia called Eprex (chemical name, erythropoietin), a supposedly identical version of a sibling called Epogen (which was manufactured in a different facility), caused a 30-fold increase in a severe kind of anemia.

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