主位推进：理论背景以及存在问题

主位推进理论被广泛地用于分析语篇，然而真正有说服力有影响力的应用研究并不多见，究其原因，主要在于大的理论框架下有些具体操作层面的问题尚待统一。这些问题有的较好解决，有的由于主住推进本身的复杂性和主观性，难以根本解决，从而影响了进一步应用研究的信度。

Thematic progression： theoretical background and existing problems

The theory of thematic progression is widely used in text analysis, but convincing and influential studies are rare. The main reason for this lies in the fact that under the main theory frame, some practical problems remain to be solved. Some of these problems can be solved, but others can hardly be completely solved due to the complexity and subjectivity of thematic analysis, which impairs the validity of further applied studies.