七个号码复式三中三多少组简介：The whole class couldn't hold it back any longer and burst into laughter together. Although they didn't know what Ptolemy's theorem or Heron's formula was, it didn't stop them from cheering.
The whole class couldn't hold it back any longer and burst into laughter together. Although they didn't know what Ptolemy's theorem or Heron's formula was, it didn't stop them from cheering.
