permutation

permutation
noun
  1. a way, especially one of several possible variations, in which a set or number of things can be ordered or arranged
    变化组合
    his thoughts raced ahead to fifty different permutations of what he must do.
    就必须要做的事他很快想出了50种不同的变化组合。
    ■[mass noun](Mathematics)the action of changing the arrangement, especially the linear order, of a set of items
    (数)排列;置换
    ■(Brit.)a selection of a specified number of matches in a football pool
    (英)(足球普尔中特定比赛场次的)挑选
派生
permutational
adjective
语源
  1. late Middle English (in the sense 'exchange, barter'): via Old French from Latin permutatio(n-), from the verb permutare 'change completely' (see permute)
英语宝典
考试词汇表