如何计算平均值公式简介：When she was folding the last pink paper crane, she stared for a long time with her icy eyes, thought about it, took out a pen and wrote something on the paper, something Su Can once said to her.
When she was folding the last pink paper crane, she stared for a long time with her icy eyes, thought about it, took out a pen and wrote something on the paper, something Su Can once said to her.
