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Discover LudwigThe phrase "been refined" is correct and can be used in written English.
You can use it to indicate that something has been improved or modified. For example, "The production process has been refined over the years to ensure higher quality output."
Dictionary
been refined
verb
To reduce to a fine, unmixed, or pure state; to free from impurities; to free from dross or alloy; to separate from extraneous matter; to purify
Exact(59)
Virtuosity has been refined into concentration.
The iPod Nano has been refined, too.
This rationale has been refined over time.
Folding bikes have been refined for the modern cyclist.
Most of my craft has been refined for millennia.
That approach now seems to have been refined.
In San Francisco the burrito has been refined and embellished in much the same way that the pizza has been refined and embellished in Chicago.
The art of casting comedians in dramatic parts has been refined at Fox in recent years.
Now that idea has been refined to make the fifth game the championship game.
But in recent years the practice has been refined and systematized.
More to the point, their marriage had been refined by the art of work.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com