若一列数中的每个数都是独立地取自某一分布的样本，则称这一列数为该分布的随机数random number

• 进入游戏后，通过随机数决定蜀魏双方中由哪一方先选择。

  After entering the game, a random number is used to decide which side, Shu or Wei, has the first choice.