Lǎo / shī / duō / nián / lái / nài / xīn / bāng / zhù / wǒ / zhè / fèn / ēn / zhòng / rú / shān / wǒ / hěn / nán / bào / dá.

老师多年来耐心帮助我，这份恩重如山，我很难报答。

My teacher patiently helped me for many years; this great kindness is hard for me to repay.