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![Therearemanyusefulinventionsintheworld. Haveyoueverwis...]( "Therearemanyusefulinventionsintheworld. Haveyoueverwis...")
Therearemanyusefulinventionsintheworld. Haveyoueverwis...
问题详情： Therearemanyusefulinventionsintheworld. Haveyoueverwishedtohaveanumbrellathatmakesyourhandsfree?AlanKaufmanhasthoughtupthe“Nubrella”,whichmeans“new”+”umbrella”isthefirsttrulyhands-fre...
