Her adoptive mother treats her better than her biological mother.
养母对她比亲生母亲还要好.
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Moreover with stepmother, but not my biological mother.
况且有了继母, 又不是我的亲娘.
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He always provides for his adoptive mother as if she were his biological mother.
他一直把义母当成自己亲生母亲来赡养.
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