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傑弗利·霍夫曼
,added Category:美國人 using HotCat
*[https://www.nasa.gov/sites/default/files/atoms/files/hoffman_jeffrey.pdf Biographical Data-JEFFREY A. HOFFMAN (PH.D.)NASA ASTRONAUT (FORMER)]
*[https://science.nasa.gov/science-committee/members/dr-jeffrey-hoffman science.nasa-Dr. Jeffrey A. Hoffman ]
[[Category:美國人]]