这项研究使用了来自欧洲、亚洲、中东和美洲七个国家的调查资料。
The study used data from seven national surveys in Europe, Asia, the Middle East, and the Americas.
威勒斯列夫博士对一具24000岁的西伯利亚骨架进行了研究，结果揭示了欧洲人和美洲原住民之间令人意想不到的联系。
His research on a 24,000-year-old Siberian skeleton revealed an unexpected connection between Europeans and Native Americans.
威勒斯列夫博士对一具24000岁的西伯利亚骨架进行了研究，结果揭示了欧洲人和美洲原住民之间令人意想不到的联系。
His research on a 24,000-year-old Siberian skeleton revealed an unexpected connection between Europeans and Native Americans.
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