例句與造句

1. In this case, the transversal is also called a "'system of distinct representatives " '.
2. The number of systems of distinct representatives ( SDR's ) of this collection is perm ( " A " ).
3. To see, conversely, that every transversal matroid is dual to a strict gammoid, find a subfamily of the sets defining the matroid such that the subfamily has a system of distinct representatives and defines the same matroid.
4. A refinement, due to H . J . Ryser, of Hall's marriage theorem gives lower bounds on the number of systems of distinct representatives ( "'SDR "'s ) of a collection of sets.
5. It's difficult to find system of distinct representatives in a sentence. 用system of distinct representatives造句挺難的