∵BF,CF分别平分∠B,∠C,∴∠DBF=∠FBC，∠ECF=∠FCB∵DE∥BC∴∠DFB=∠FBC，∠EFC=∠FCB∴∠DBF=∠FBC，∠ECF=∠EFC∴DB=DF,DE=DC∴BD+CE=9望采纳
