本文的理论基础是中介语对比理论和母语迁移。
The theoretical foundations employed in this study involve Contrastive Interlanguage Analysis (CIA) and L1 transfer.
这一对比表明理论和实践之间有相当大的出入。
The comparison shows considerable disagreement between theory and practice.
心理学家对此有三个主要的理论——说服模式，对比模式和异化模式——但每一种模式都有近似的原因。
Psychologists have three main theories for why this group polarization occurs—persuasion, comparison and differentiation—but all of them have much the same cause.
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