Tous,itseemstonaturaltoputupanumbrellatokeepthewater...
問題詳情： Tous,itseemstonaturaltoputupanumbrellatokeepthewateroffwhenitrains.Butinfacttheumbrellawasnotinventedasprotectionagainsttherain,Itsfirstusewasasashade(遮蔽)againstthesun.Nobodyknowswhofi...