zhè / liǎng / gè / jìng / zhēng / duō / nián / de / pǐn / pái / yǐ / jīng / shì / bù / liǎng / lì / hěn / nán / zài / hé / zuò

这两个竞争多年的品牌已经势不两立，很难再合作。

These two brands, which have competed for years, are irreconcilable and are unlikely to work together again.