conditional variance的用法和样例：
例句
- Finally, the realistic meaning of persistence character of conditional variances in finance analysis is discussed.
最后讨论了条件方差持续性质在金融分析中的现实意义。 - The outside impact has persistent effect to the conditional variance, and the negative impact would bring higher conditional variance than the equivalent positive one.
场外冲击对条件方差的影响具有持久性，反向冲击比等量的正向冲击会导致更高的下一期的条件方差。
