我从1993年开始就是佩洛特系统（Perot System）公司的监事会成员，如今我每次去达拉斯（Dallas）都要去拜望蕾西，战后她同唐生活在那里。现在她已孀居。
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研究论文，通过思考一些复杂和支离破碎的细节，用涉及希尔伯特系统和熵的数学来支持论证。
The research paper, thought a bit esoteric and lacking in detail, supports its argument with math involving Hilbert systems and entropy.
他说奥特根不久将使用燃料电池系统供热和发电，以便在楼房租赁市场低迷的情况下部分地降低能耗。
He said the Octagon would soon switch to a fuel cell system for heat and electricity, partly to cut energy costs at a time of a depressed rental market.
在另一个案例中，美国考古学家家雷内·米利恩和乔治·考吉尔花了数年时间，系统地测绘了位于墨西哥河谷的整个特奥蒂瓦坎市，即现在的墨西哥城附近。
In another case, American archaeologists Rene Million and George Cowgill spent years systematically mapping the entire city of Teotihuacan in the valley of Mexico near what is now Mexico City.
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