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人们从生后不久即分居两地的同卵双生儿的健康状况和精神心理的比较研究中了解到不少人的形成过程中的遗传和环境方面的知识。英国、丹麦和美国在很早以前就对这一问题进行了研究并且取得了一定的成果,留下了不少宝贵的资料。1937年,美国有关部门经过对19组双生儿的调查以后,发表了一篇论文,题为“双生儿的遗传和环境的研究”。据最近报道(Science,1980年
People from the comparative study of the health status and mental psychology of identical twins who live in two places soon after birth understand the genetic and environmental aspects of many people’s formation. The United Kingdom, Denmark and the United States conducted a long-term study of this issue and achieved some results, leaving a lot of valuable information. In 1937, the U.S. authorities published an essay entitled “Studies on the Genetics and Environment of Twins,” after surveying 19 twins. According to a recent report (Science, 1980