xún huán sài / de / sài chéng / hěn cháng / yīn wèi / cān sài / duì wǔ / yào / lún liú / bǐ sài

循环赛的赛程很长，因为参赛队伍要轮流比赛。

The round-robin schedule is very long because the participating teams have to take turns playing.