两个变量之间的相关性用简单相关分析。

Simple correlation analysis was adopted for two variables.

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然后用其分析了我国股市主要指数的相关性，发现时变相关系数能够准确的描述两个变量相互之间的长期运动趋势。

Then we analysised the correlation of the main stock index in Chinese market, it was found that conditional correlation can describe accurately a long time moving trend of two variables.

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