Poor Tom, who is always the black sheep of the family, is always in disgrace.
可怜的汤姆, 他是这一家的不肖之子, 总是不受人尊重.
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Debbie is the black sheep of the family , having left home at seventeen to live with her boyfriend.
德比是个不肖女, 十七岁就跟男友离家私奔了.
《简明英汉词典》
After he had been in prison Peter was regarded as the black sheep of the family.
彼得坐过牢之后,被看作是家庭中的不肖子孙.
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