·2,447,543篇论文数据，部分数据来源于NoteExpress
Note the differences in formality and personalness and the degree to which the students recognize the hierarchical difference between themselves and the teacher.
阅读这两个场景对话，注意它们表现出来的正式性程度的不同，以及对师生等级关系的认识差异。
youdao
应用推荐
模块上移
模块下移
不移动