This paper takes a system dynamic approach to study homogeneous texts where the dynamics of the lexical richness of such texts over time are of the focal concern. It is hypothesized that the progress of the lexical complexity is driven by how far away this process is from the maximum level of complexity, while is subject to the fluctuations due to…

This paper mainly explores the impacts of presenting new words in semantically-related (SR) sets on vocabulary learning. 38 students from two classes of Grade 2 in Taiyuan Foreign Language School (Senior High School Section) participate in the whole process. The same vocabulary items unknown to all students are taught to them in 4 lessons. The…