upstreamadj.上游的；逆流而上的adv.向上游；逆流地upstream and downstream上游和下游upstream syntaxis noise上行汇聚噪声upstream binding factorUBFupstream region of gene基因上游upstream of the Yangtze长江上游upstream control region上游控制区upstream activation site上游激活位点upstream radius of crest坝顶上游面曲率半径upstream control elementUCEupstream weighted scheme迎风加权格式