- 问题详情:Thisyearmarks45yearssinceNeilArmstrongbecamethefirstpersontowalkonthemoon,taking“onesmallstepformanandonegiantleapformankind.”Overall,12Americanastronautshavewalkedonthelunarlandscape,thelastdoingsoin1972.Enthusiasmforspacetravelhasalwaysin...
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