tā / zài / chū fā / yuǎn xíng / qián / xǔ xià / shì yuàn / yí dìng / huì / huí dào / gù xiāng

她在出发远行前许下誓愿，一定会回到故乡。

Before setting off on her journey, she made a vow that she would definitely return to her hometown.