过去几十年，商界领袖和政策制定者把这一问题定性为“人才供应链 问题”“技能短缺”和“中等技能劳动力危机”。参阅“Middle Skills，”U.S. Competitiveness，Harvard Business School website， accessed May 22，2018， https://www.hbs.edu/competitiveness/research/Pages/middle-
28．1958年，兰利机场成为NASA兰利研究中心，又名“NASALangley”和“LaRC”。
30．Margot Lee Shetterly, Hidden Figures: The American Dream and the Untold Story of the Black Women Mathematicians Who Helped Win the Space Race, media tie-in ed. (New York: William Morrow, 2016), 4.
31．Ibid.
32．Ibid., 21.
33．Ibid., 61.
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