德系犹太人，指生活中欧、北欧和东欧的犹太人，原居住在莱茵河流域和法兰西。
他认为正是异常的历史环境强加给了德系犹太人独有的进化压力，才导致了这些看似奇怪的现象。
His argument is that the unusual history of the Ashkenazim has subjected them to unique evolutionary pressures that have resulted in this paradoxical state of affairs.
Cochran博士认为，德系犹太人也面临着同样的情况，他们的某些基因如果以单组出现就可以提高智力，一旦以双组出现就会引起疾病。
Dr Cochran argues that something similar happened to the Ashkenazim. Genes that promote intelligence in an individual when present as a single copy create disease when present as a double copy.
这个来自纽约爱因斯坦医学院（Albert Einstein College of Medicine）的研究小组在对美国德系犹太人社区行研究后声称：这一发现可以导致一种抗衰老药物的诞生。
The team from Albert Einstein College of Medicine in New York, who studied an American Ashkenazi Jewish community, said that the finding could lead to anti-aging drugs.
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