partial permutations造句

例句与造句

1. In elementary combinatorics, the-permutations, or partial permutations, are the ordered arrangements of distinct elements selected from a set.
2. Its sequent calculus relies on the structure of order varieties ( a family of cyclic orders which may be viewed as a species of structure ), and the correctness criterion for its proof nets is given in terms of partial permutations.
3. It's difficult to find partial permutations in a sentence. 用partial permutations造句挺难的