This can be proved both in descriptive research and expositive research, and in particular, in descriptive research on sandhi rules and types.
这可以从描写性研究和解释性研究两方面来考察，尤其关于变调规律和变调类型的描写研究更为深入。
2
There are 5 patterns in the TV news comment on the typological angels: inserted comment, expositive comment, narrative comment, mutual comment and miscellaneous comment.