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最后的答案是零。本周,美国能源部下属高级能源研究计划局(ARPA-E)主任艾伦·威廉姆斯(Ellen Williams)宣布该机构已经打败了亿万富豪。她说,ARPA-E已经找到了“电池的圣杯”,能让我们“创造全新的电池技术方法,让它起作用,并且在商业上可行。”

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