单词：tournaments
n. a series of jousts between knights contesting for a prize
tournaments的用法和样例：
例句
- An enumeration problem is solved for labeled consistent bipartite tournaments,and a sharp formula is obtained.通过讨论，解决了标定一致二部竞赛图的计数问题，并获得了一个简明计算公式。
- In this paper, we study the transitive properties of bipartite tournaments and tournaments, and give the sufficient and necessary conditions of them.摘要研究了二部竞赛图和竞赛图的传递性，给出了它的充分必要条件。
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