TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.
EllaGrasso,electedgovernorofConnecticutin1974,supportedtheenactment(given,granted)ofafreedom-of-informationlaw.
DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.
TheeconomyofDallas,Texas,isstronganddiversified.
Somechildrendisplayanunquenchable难以抑制的curiosityabouteverynewthingtheyencounter.
Urbanrenewalprogramsstrivetoupgradeareasthatarebecomingslums.