EarthDay， 4 （mark）on22April，isanannualeventaimingtorais...
問題詳情：EarthDay， 4 （mark）on22April，isanannualeventaimingtoraisepublicawarenessaboutenvironmentalprotection.Firstcelebrated 5 1970，theDaynowincludeseventsinmorethan190countriesandregions（地區）.Nomatt...