四度春风化绸缪，  
                                几番秋雨洗鸿沟。  
                                黑发积霜织日月，  
                                粉笔无言写春秋。  
                                蚕丝吐尽春未老，  
                                烛泪成灰秋更稠。  
                                春播桃李三千圃，  
                                秋来硕果满神州。