De yu shi yong yu fa

Ben shu you chu ji pian,Zhong ji pian he yi nan pian san bu fen zu cheng.Chu ji pian yi biao ge xing shi she ji le chu xue zhe ying gai zhang wo de suo you yu fa nei rong;Zhong ji pian shi yi xie nan du jiao da de yu fa nei rong;Yi nan pian wei de yu yu fa xue xi zhong de yi xie yi nan wen ti.