原创非洲裔美国人历史中,有许多重大的人和事,在教材中都见不到—上
katherine johnson: nasa mathematician and much-needed role model
凯瑟琳·约翰逊(katherine johnson):伟大的数学家和物理学家(塔拉吉
for decades katherine johnson remained the unheralded hero who&
katherine johnson, nasa mathematician and an inspiration for '