Gōng / rén / zhèng / zài / qīng / lǐ / lù / biān / de / pái / shuǐ / qú / yǐ / miǎn / fā / shēng / jī / shuǐ.

工人正在清理路边的排水渠，以免发生积水。

Workers are clearing the roadside drainage channel to prevent water from accumulating.