- 问题详情:LastsummerIleatorideabicycle.Atfirst,Iwasabletocontrolitsdirection.SometimesIfalltotherightortotheleft.Iwasworrying,askingmyfatherimpatientlywhyhecouldn’tridestraight.Sohedidn’tanswermedirectly.Insteadof,hetookmetosideofthestreet."Canyoufi...
- 14860