概率方差D(X)公式简介：After seeing Zhang Jing Xiaolu's strength just now, Patriarch Tian Ming decided to say this, hoping to turn the conflict into friendship. After all, the relationship between them was just a dispute of temper.
After seeing Zhang Jing Xiaolu's strength just now, Patriarch Tian Ming decided to say this, hoping to turn the conflict into friendship. After all, the relationship between them was just a dispute of temper.
