The study was small, and examined a limited patient population, said Dr. Valerie Fitzhugh, a pathologist at Rutgers University who wasn't involved in the research.

罗格斯大学的病理学家瓦莱丽·菲茨休 (Valerie Fitzhugh) 博士没有参与这项研究， 他说，这项研究规模很小， 只检查了有限的患者群体。

For the Aztecs seven centuries ago, settling on an island in lake Texcoco not only fulfilled an ancient prophecy but made perfect geographic sense with their understanding of technology and limited population at the time.

对于七个世纪前的阿兹特克人来说，在特斯科科湖的一座岛上定居不仅实现了一个古老的预言，而且凭借他们对技术的理解和当时有限的人口，这在地理上也完全合理。