Doyoueverpracticeplayingthepianoinyourmindbytappingonim...
問題詳情：Doyoueverpracticeplayingthepianoinyourmindbytappingonimaginaryblackandwhitekeyswhenyouhavenopianoinfrontofyou?It’snotunusual--greatpianistslikePolish-AmericanArthurRubinsteinsometimesusedtopr...