Tā / qíng / dòu / chū / kāi / dì / yī / cì / tǐ / huì / dào / xǐ / huān / yí / gè / rén / de / gǎn / jué

她情窦初开，第一次体会到喜欢一个人的感觉。

She was experiencing romantic feelings for the first time and discovered what it felt like to like someone.