frontiers造句
Openupyournewfrontiers!Theyarethefrontiersofficersandmen,isastranger!Therearethreefrontiers.Firstisproductionfrontier.Russianscientistshavecureddisease,soughtnewfrontiersofprogress,andhelpedusgotospac...
Openupyournewfrontiers!Theyarethefrontiersofficersandmen,isastranger!Therearethreefrontiers.Firstisproductionfrontier.Russianscientistshavecureddisease,soughtnewfrontiersofprogress,andhelpedusgotospac...