Yī / shēng / shuō / hé / lǐ / yǐn / shí / yǒu / zhù / yú / wéi / chí / cháng / dào / nèi / de / zhèng / cháng / jūn / qún

医生说，合理饮食有助于维持肠道内的正常菌群。

The doctor said that a balanced diet helps maintain the normal microbiota in the gut.