例句與造句

1. The directed graph realization problem is the problem of finding a directed graph with the degree sequence a given sequence of positive integer pairs . ( Trailing pairs of zeros may be ignored since they are trivially realized by adding an appropriate number of isolated vertices to the directed graph . ) A sequence which is the degree sequence of some directed graph, i . e . for which the directed graph realization problem has a solution, is called a directed graphic or directed graphical sequence.
2. It's difficult to find graphical sequence in a sentence. 用graphical sequence造句挺難的