单双循环问题公式简介：Gin threw his hair out the window. Suddenly, with a cold light in his eyes, he picked up the crumpled chewing gum from the junction of the iron bars under the folded back seat.
Gin threw his hair out the window. Suddenly, with a cold light in his eyes, he picked up the crumpled chewing gum from the junction of the iron bars under the folded back seat.
