Introduction
    一、Introduction 中用来引出自己研究重要性以及创新
性以及前人研究的不足之处的句型和句式
1、However, little information/attention/work/data/research … (or few studies/i
nvestigations/ researchers/attempts …) (or no/none of these studies) has (hav
e) been done on/focused on/attempted to/conducted/investigated/studied (with
respect to) …
2、Previous research/studies/records has/have failed to consider/ignored/misint
erpreted/negle‐ ‐cted to/overestimated/underestimated/misleaded …. Thus, thes
e previous results are inc ...