Therearemanyusefulinventionsintheworld. Haveyoueverwis...
問題詳情: Therearemanyusefulinventionsintheworld. Haveyoueverwishedtohaveanumbrellathatmakesyourhandsfree?AlanKaufmanhasthoughtupthe“Nubrella”,whichmeans“new”+”umbrella”isthefirsttrulyhands-fre...