数学单双循环公式简介：After the class teacher left, the boys in the class looked at Su Can with envy and jealousy, as if they were surprised that this guy had gained the trust of his old class without saying a word. This was really awesome.
After the class teacher left, the boys in the class looked at Su Can with envy and jealousy, as if they were surprised that this guy had gained the trust of his old class without saying a word. This was really awesome.
