Todayrollerskatingis的精選

問題詳情：Today,rollerskatingiseasyandfun.Butmanyyearsago,itwasn'teasyatall.Before1750,peoplenevertriedskatingonwheels.ThatchangedbecauseofamannamedJosephMerlin.Merlin'sworkwasmakinginstruments.Inhisf...