I mean, in the beginning I had this relation that was an equation of degree three. You don't really want to solve your equation for the dependent variable usually.

我的意思是，在开始有一个关系，这个关系是一个三元方程，一般地，不会为了求因变量而求解一个方程。

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A new method which can efficiently and accurately calculate the mean and standard deviation of a dependent random variable is proposed.

对于从属随机变量统计特征的确定，本文介绍了一种精确高效的确定其均值和标准差的方法。

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