| 单词 | upstream |
| 释义 | upstream [ˌʌp'stri:m] adverb adjective [before noun] ■(moving) on a river or stream towards its origin 在上游（的）；向上游（的）；逆流（的） •Salmon swim upstream against very strong currents to reach their breeding areas.鲑鱼会迎着湍急的水流游向它们在上游的产卵区。 Opposite downstream |
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