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四月 1, 1988

1分钟阅读

空中楼阁？

总统要求为民用研发增加 12 亿美元拨款

作者蒂姆·比尔兹利

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This article was originally published with the title “Pie in the Sky?” in 大众科学 Magazine Vol. 258 No. 4 (April 1988), p. 20
doi:10.1038/scientificamerican0488-20a

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