三中三公式计算详细简介：Ahem, class is on, and Old Man Yan is here! A classmate sitting by the window reminded the class and told them to quiet down. Monitor Li Tao also came out to maintain discipline.
Ahem, class is on, and Old Man Yan is here! A classmate sitting by the window reminded the class and told them to quiet down. Monitor Li Tao also came out to maintain discipline.
