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).
权威例句
1. Every sort of permutation and combination is possible in human nature.
火的本性可能有各种交织和组合的情况.
2. Such a permutation is called a derangement.
这样的一个排列称为错位排列.
3. Other enumeration problems lead us to the study of orbits of permutation groups.
其它的计数问题引导我们去研究置换群的轨道.
4. The permutation is even if the number of inversions it contains is even.
如果一个排列中含有的反序的个数是偶数,则称它为偶排列.
5. Unique because that particular permutation has not appeared before.