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The study of second language acquisition under the dynamic system theory is more suitable for describing the dynamics of second language acquisition because of the attention to the interaction of multiple factors in the system and the development and changes of the related factors in time. The study of second language acquisition under the dynamic system theory should first find out the group of important factors in the second language acquisition system. Firstly, test it in the positive layer. Secondly, it pays attention to the interaction between the key factors in the system and the characteristics of their development with time, and explores the regularity of the dynamic development of the system. Finally, according to the purpose of research, various research methods are creatively used to achieve scientific description or prediction of second language acquisition.

Deficiencies and Countermeasures of Second Language Acquisition from the Perspective of Dynamic System Theory