相关单词同义词lower, 近义词 downriver 下游的反义词upstream, 上游的临近词downtime, downstairs, downstream bay, downstream bed, downstream toe, downstream end, downstream box, downstream flow, downstream site, downstream gain, downstream gene, downstream tube相似词downsize, downspout, downstage, downstairs, downswing, downtime, downtoner, downtown, 返回 downstream