HSK 4
Lùbiān de páishuǐgōu dǔzhù le.
The roadside gutter is blocked.
HSK 7-9
Yǔshuǐ shùnzhe páishuǐgōu liú zǒu le.
The rainwater flowed away through the drainage ditch.
HSK 7-9
Shīgōng duì wā le yī tiáo páishuǐgōu.
The construction crew dug a drainage ditch.
