并根据数学分析中一元函数和多元函数的极限的相关知识，在理论上证明了该指标的有效性。

According to unary function limit and multivariate function limit of mathematical Analysis, the validity of the index Vnew is proved in theory.

youdao

并根据数学分析中一元函数和多元函数的极限的相关知识，在理论上证明了该指标的有效性。

According to unary function limit and multivariate function limit of mathematical Analysis, the validity of the index Vnew is proved in theory.

youdao