wǒ / cè shēn / yú / jiào yù jiè / sān shí / nián / jiàn zhèng / le / wú shù / xué shēng / de / chéng zhǎng

我厕身于教育界三十年，见证了无数学生的成长。

I have been involved in education for thirty years and witnessed the growth of countless students.