第一章为因果关系理论分析。
但是，没有理论能够证明二者之间的因果关系。
But there is little academically accepted evidence of a causal relationship.
传统理论研究关注的是因果关系的界定及其判断，对于因果关系本身的机能研究欠缺。
The traditional fundamental research is more concerned about its definition and judgment than its functions.
传统理论研究关注的是因果关系的界定及其判断，对于因果关系本身的机能研究欠缺。
The traditional fundamental research is more concerned about its definition and judgment than its functions.
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