permutation

n. 交换, 更动, 排列 [计] 排列

发音

UK /ˌpɜː.mjʊˈteɪ.ʃən/
其它
UK /ˌpɜː.mjʊˈteɪ.ʃn̩/
US /ˌpɝ.mjʊˈteɪ.ʃ(ə)n/
AU /ˌpɜː.mjʉˈtæɪ.ʃən/
AU /ˌpɜː.mjʉˈtæɪ.ʃn̩/

词形变化

permutations 复数 permutations

释义与例句

n.
  1. 1.

    One of the ways something exists, or the ways a set of objects can be ordered.

    可数 不可数

    Which permutation for completing our agenda items makes the most sense?

  2. 2.

    A one-to-one mapping from a finite set to itself.

    可数 不可数 数学

    This permutation takes each element to the one following it, with the last mapped back to the first.

  3. 3.

    An ordering of a finite set of distinct elements.

    排列

    可数 不可数 数学

    There are six permutations of three elements, e.g. {abc, acb, bac, bca, cab, cba}.

  4. 4.

    A transformation of a set's prime form, by applying one or more of certain operations, specifically, transposition, inversion, and retrograde.

    可数 不可数 音乐

词汇关系

名词

同义词 4

switch replacement substitution transposition

上位词 6

operation translation transformation variation fluctuation reordering

相关短语

permutation lock permutation group [计] 置换群 [化] 置换群 permutation groups permutation locks permutation box permutation boxes simsun permutation vexillary permutation

词源

From Middle English permutacioun, permutacyoun, from Old French permutacïon, promutatïon and Medieval Latin permūtātiōnem, accusative of permūtātiō. Morphologically permute + -ation.

来源：wiktionary