| 词汇 | upstream |
| 释义 | upstream adverb, adjective [ before noun ] uk/ˌʌpˈstriːm/ us/ˌʌpˈstriːm/ 在上游（地）;向上游（地）;逆流（地） (moving) on a river or stream towards its origin Salmon swim upstream against very strong currents to reach their breeding areas. 大麻哈鱼会迎着湍急的水流游向上游它们的产卵区。 在（某过程或事件的）前阶段 relating to an earlier stage in a process or series of events The company's upstream business includes oil exploration and production. 这家公司的上游业务包括石油勘探和开采。 Opposite: downstream |
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