Exploringspaceisadreamsharedbymanypeople,butfewhaveever...
問題詳情：Exploringspaceisadreamsharedbymanypeople,butfewhaveeverexperiencedthethrillofspaceadventure.Afewyearsago,thatfieldwasopenonlytothosewhoworkedforNASAorthespaceprogramsofothernations.Butnowpriva...