AyoungmanaskedAlbertEinstein,thegreatGermanscientist,whatthesecret(秘诀)ofsuccess(成功)is.Thescientisttoldhimthatthesecretofsuccessishardwork.Afewdayslatertheyoungmanaskedhimthesamequestionagain.Einsteinwasveryunhappy.Hedidnotsayanything,butwroteafewwordsonapieceofpaperandhandedittotheyoungman.Theyoungmanlookedatthepieceofpaper.Onitwaswritten:A=x+y+z.
