didactically       
adverb  mainly disapproving uk/daɪˈdæk.tɪ.kəl.i/ us/daɪˈdæk.t̬ɪ.kəl.i/
 教训地,说教地
in a way that is intended to teach, especially in a way that is fixed and unwilling to change
  "That's the way we always do it," Smith explained, didactically. “我们一直就是这么做的,”史密斯用教训的口吻解释道。 
 His words are didactically inscribed on each canvas. 他的话以训诫的形式写在每张画布上。 
 See: didactic
 - More examples
 - The story is told as much didactically as in narrative form.
 - It was the first didactically historical museum in Europe.
 - Rather than teaching didactically, they provide a rich variety of hands-on activities and encourage children's exploration and experimentation.