例句與造句

1. The Fibonacci cube is also the graph of a distributive lattice that may be obtained via Birkhoff's representation theorem from a zigzag poset, a partially ordered set defined by an alternating sequence of order relations " a " < " b " > " c " < " d " > " e " < " f " > . . . There is also an alternative graph-theoretic description of the same lattice : the independent sets of any bipartite graph may be given a partial order in which one independent set is less than another if they differ by removing elements from one side of the bipartition and adding elements to the other side of the bipartition; with this order, the independent sets form a distributive lattice, and applying this construction to a path graph results in the lattice associated with the Fibonacci cube.
2. It's difficult to find zigzag poset in a sentence. 用zigzag poset造句挺難的