liǎng / jiā / gōng / sī / àn / lǐ / jìng / zhēng / le / hěn / jiǔ / zuì / hòu / cái / gōng / kāi / hé / zuò

两家公司暗里竞争了很久，最后才公开合作。

The two companies competed secretly for a long time before finally working together publicly.