单词 | Banneker, Benjamin |
释义 | Banneker, Benjamin/ˈbanikər![]() (1731–1806), US inventor, astronomer, and mathematician. Born to a slave father and freed slave mother, he published an almanac 1791–1802 that featured his astronomical and tide calculations. On the recommendation of Thomas Jefferson, he was hired to assist in the surveying of the District of Columbia 1790. |
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