upstream 的英语意思
upstreamupstream /ˌʌpˈstriːm◂/ adverb 
查看全部语言翻译 along a river, in the opposite direction from the way the water is flowing沿河流逆流而上，与水流方向相反 OPP downstream: 
Fish instinctively fight their way upstream against the current.鱼类本能地逆流而上，与水流搏斗。—upstream adjective
查看全部语言翻译 along a river, in the opposite direction from the way the water is flowing沿河流逆流而上，与水流方向相反 OPP downstream: Fish instinctively fight their way upstream against the current.鱼类本能地逆流而上，与水流搏斗。—upstream adjective