to dredge navigable canals

• 疏浚河道

to dredge navigable canals的用法和样例：

例句

1. On the lower-middle reaches,endeavors will be pooled to return the grain plots to lakes,dismantle embankments to remove barriers,dredge water channels,and build concrete dikes.
   在中下游地区，退田还湖，拆垸清障，疏浚河道，修建钢筋混凝土堤防。