permutation
英 [pɜːmjʊ'teɪʃ(ə)n]
美 ['pɝmjʊ'teʃən]
助記提示
在數學的排列與組合中用 A 代表 Arrangement 表示“排列”(在舊教材為 P -> Permutation),用 C 代表 Combination 表示“組合”,所以如果你還記得排列與組合的計算公式的話,就一目了然了。
中文詞源
permutation 置換,排列組合per-,完全的,-mut,改變,詞源同mutual,mutable.用於數學名詞置換,排列組合。
英文詞源
- permutation (n.)
- mid-14c., from Old French permutacion "change, shift" (14c.), from Latin permutationem (nominative permutatio) "a change, alteration, revolution," noun of action from past participle stem of permutare "change thoroughly, exchange," from per- "thoroughly" (see per) + mutare "to change" (see mutable).
雙語例句
- 1. Every sort of permutation and combination is possible in human nature.
- 火的本性可能有各種交織和組合的情況.
來自辭典例句
- 2. Such a permutation is called a derangement.
- 這樣的一個排列稱為錯位排列.
來自辭典例句
- 3. Other enumeration problems lead us to the study of orbits of permutation groups.
- 其它的計數問題引導我們去研究置換群的軌道.
來自辭典例句
- 4. The permutation is even if the number of inversions it contains is even.
- 如果一個排列中含有的反序的個數是偶數,則稱它為偶排列.
來自辭典例句
- 5. Unique because that particular permutation has not appeared before.
- 之所以獨一無二,是因為那種獨特的基因排列組合以前不曾出現過.
來自互聯網