"Competition rules" 或 "tournament rules" 是表示比赛规则的常用说法。这个短语来源于英语中表示比赛、竞赛等意思的单词 "competition" 和 "rules"。
例句：
"Please review the competition rules before entering the tournament." (请在参赛前阅读比赛规则。)
"The rules for the basketball competition have been posted on the website." (篮球比赛的规则已经在网站上发布。)
"It is important to follow the tournament rules in order to ensure a fair competition." (遵守比赛规则很重要，以确保比赛公平。)