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— as in: a variation on a theme
Scientists are worried about a new
of the virus.
something that is different than others of its type (synonyms could include: adaptation, version, alternate form)
— as in: a 60% variation
They found a
of 600% in the cost of having a baby—largely determined by which hospital was selected for delivery.
difference — typically between things of the same type, or within a limited range
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