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BNC: 12214 COCA: 11313

upstream

1 ENTRIES FOUND:
upstream /ˈʌpˈstriːm/ adverb
upstream
/ˈʌpˈstriːm/
adverb
Learner's definition of UPSTREAM
: in the direction opposite to the flow in a stream, river, etc. : toward the source of a stream, river, etc.逆流;向上游

— upstream

adjective

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