例句與造句

1. In particular, for hedonic games given by individually rational coalition lists, it is NP-complete to decide whether the game admits a core-stable, a Nash-stable, or an individually stable outcome . and complete for the second level of the polynomial hierarchy to decide whether there exists a core-stable outcome, even for symmetric additive preferences.
2. It's difficult to find additive preference in a sentence. 用additive preference造句挺難的