Multifactor model holds important position in modern investment theories.
多因素模型在现代投资理论中居于重要地位。
The major points are: whether language aptitude is a single factor or multifactor construct;
主要内容有：外语学习能力是单因还是多因概念；
The major points are: whether language aptitude is a single factor or multifactor construct;
主要内容有：外语学习能力是单因还是多因概念；
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