black sheep of the family

• 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。
• He had called martin the black sheep of the family and repudiated him
  史密特把马丁称作他们家族的害群之马，表示和他绝了交。
• 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。
• He was the black sheep of the family after he had got involved in the bank robbery
  在他被牵累进银行抢劫案后，就成了全家的败家子。
• Her brother is a lawyer and her sister is a doctor . they say she is the black sheep of the family because she decided to be a waitress
  哥哥是个律师，而她的姐姐是个医生。他们说她有辱门楣因为她决定当女招待。