He teamed up with Walter Scheidel, a Stanford classicist and historian, to create a model of population growth and decline based on coin-hoard data gathered over the years.
他与WalterScheidel合作，Walter Scheidel是斯坦福的一个古典学者与历史学家。他们发明了一个人口增长模型，这个模型基于钱币藏匿的数据，这一工作已进行多年。
While reading the newspaper, Walter came across an article about a beautiful actress and model who married a boxer who was not noted for his IQ.
沃尔特看报时发现一篇文章，说有个漂亮女演员兼模特嫁给了一个智商并不出色的拳击手。
While reading the newspaper, Walter came across an article about a beautiful actress and model who married a boxer who was not noted for his IQ.
沃尔特看报时发现一篇文章，说有个漂亮女演员兼模特嫁给了一个智商并不出色的拳击手。
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