1 sentence

1. 这条河道淤积严重，需要定期进行人工疏浚。

   zhè tiáo hé​dào yū​jī yán​zhòng, xū​yào dìng​qī jìn​xíng rén​gōng shū​jùn.

   This river channel is heavily silted and requires regular manual dredging.

   Source: Dong Chinese Dictionary