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1·The music industry is an incestuous business.

音乐界是一个封闭的行业。《牛津词典》

2·Its inhabitants are a close and incestuous bunch.

该地居民紧密抱团，狭隘排外。《柯林斯英汉双解大词典》

3·They accused her of an incestuous relationship with her father.

他们指控她与父亲有乱伦关系。《柯林斯英汉双解大词典》