liǎng / jiā / gōng / sī / de / shì / chǎng / fèn / é / cǐ / xiāo / bǐ / zhǎng / jìng / zhēng / yì / zhí / hěn / jī / liè

两家公司的市场份额此消彼长，竞争一直很激烈。

The two companies' market shares rose and fell against each other, and the competition remained intense.