请帮忙给出正确答案和分析，谢谢！
He has a long criminal record.（英译中)
He has a pain in the knee.（英译中)
He has a mild nature.（英译中)
He used a miller to mill the grain into flour.（英译中)
He has a kind heart.（英译中)
He has a degree in world history.（英译中)
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