qiánrén / zài / zhè / piàn / tǔdì / shàng / liúxià / de / shuǐlì / gōngchéng / zhìjīn / réng / zài / fāhuī / zuòyòng

前人在这片土地上留下的水利工程，至今仍在发挥作用。

The irrigation works left by earlier generations on this land are still serving a purpose today.