upstreamadj.上游的;逆流而上的adv.向上游;逆流地
upstream cofferdam上游围堰
upstream operations[经] 上游作业
upstream crime rang上游犯罪
upstream economizer逆流式省煤器
upstream reservoirs上游建库
upstream enterprise上游企业
upstream water line上游水位线
upstream resistance上游(气道)阻力
upstream monopolist上游垄断
upstream industries上游工业