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The reasons causing the above defect and its influencing factors have been analyzed.
并分析了出现上述缺陷的原因及影响因素。
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The precocious 6-year-old was born with a congenital heart defect and had a complication with a tube inserted in his right leg, leading to an amputation above his knee.
CNN: Double amputee loses legs, finds a cause
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