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美国科学人

1987年9月1日

1分钟阅读

稳步前进...

许多科学家认为在太空计划中缺乏方向

作者：蒂姆·比尔兹利

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This article was originally published with the title “Two Steps Forward ...” in 大众科学 Magazine Vol. 257 No. 3 (September 1987), p. 18
doi:10.1038/scientificamerican0987-18a

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