The total number of family names in this country has been the subject of a careful study by Elsdon C. Smith, for his Story of Our names.
艾尔·斯顿c。史密斯在《名字的故事》一书中，仔细地研究了美国姓氏的总数。
The total number of family names in this country has been the subject of a careful study by Elsdon C. Smith, for his Story of Our names.
艾尔·斯顿c。史密斯在《名字的故事》一书中，仔细地研究了美国姓氏的总数。
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