Chapter 1 surveys related literatures and put forward this dissertation's theoretic foundations.
第1章在对有关文献进行综述的同时提出本论文研究的理论基础。
These theories that include different aspects of learning are solid theoretic foundations of cooperative learning.
这些理论包含着有关学习的各个方面，是合作学习的坚实的理论基础。
However, such existential ideas in the novel have not been fully revealed by previous studies because most of them lack solid theoretic foundations.
然而，由于缺乏坚实系统的理论基础，先前对于这部小说的研究未能全面地反映出这些存在主义思想。
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