  

            

                                                 
                                                                                 1468                                                                                                 
                                  《        》                                        《                     》 《                         》                                                  《                    》          《                           》                 
                                                                        《           》                          《                                  》   
                                           
                                                                                                                                                                                                       
    《   》                     《     》                                            《                 》                                                         
            1479 1516                                                                                    《     》 4     《 15              20          …          …                                                                                          1479                                                                     》                            《                              …                                                        》    (   )