(; ) at or connected with an early stage in an industrial or commercial process（工业或商业流程）上游的◆The company plans to expand its upstream business in oil and gas.这家公司计划扩大石油和天然气等上游业务。⨁upstream assets / businesses / earnings / operations上游资产／企业／收益／业务▸ˌupˈstream
adverb
◆Manufacturers are looking both upstream and downstream to improve efficiency.制造商希望从上游和下游两个方面提高效率。OPPdownstream