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Discover LudwigThe phrase "is upstream" is grammatically correct and can be used in written English.
Definition: "Upstream" refers to a direction opposite the flow of a river or current, or in relation to the source or beginning of something. Example: "The town's water supply is located upstream from the industrial plant." This means that the town's water source is located in the opposite direction of the industrial plant, towards the source of the river. Another example: "We need to go upstream to find the origin of this problem." In this sentence, "upstream" is used metaphorically to mean going back to the beginning or root cause of the problem.
Dictionary
is upstream
adverb
Against the current
synonyms
Exact(58)
Cheatham Dam is upstream from Clarksville.
The Mount Coffee Hydroelectric Plant (1966) is upstream.
Imbrication is upstream on riverbeds and seaward on beaches.
However, whether one pathway is upstream of the other remains unclear.
Our work suggests that a key pathophysiologic event in ALS is upstream of aggregate formation.
"The idea behind this is that it is upstream intervention, which actually saves the NHS and social services money.
(Lake Powell, which is upstream from Mead, has nearly the same maximum capacity and has shrunk by almost as much).
Thus, HIF target gene activation is upstream of mitochondrial function and is responsible for altering mitochondrial activity.
"But what we really need is upstream influence on policy here".
Similar(2)
Finally, after our Bmp2 experiments, we observed that miR-133 is upstream-regulated by Bmp2.
Emergency government meetings are being held to ensure there is 'upstream management of illegal migratory flows.' Excuse me?
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com