河道

bì xū shū tōng hé dào

必须疏通河道

must dredge a river

hé dào xiá zhǎi

河道狭窄。

The river course is narrow.

hé dào biàn qiān

河道变迁

shifting of the river course

shū jùn hé dào

疏浚河道

dredge a river

wān yán de hé dào

蜿蜒的河道

the serpentine course of the river

hé dào zài cǐ chù kāi kuò qǐ lai

河道在此处开阔起来。

The river broadens out at this point.