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upriver

adverb
🔊/ˌʌpˈrɪvə(r)/
🔊/ˌʌpˈrɪvər/
(also upstream)
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  1. upriver (of/from something) along a river, in the opposite direction to the way in which the water flows向（或在）上游；逆流Topics Geographyc1