B2 [ C or U ] a change in amount or level变化;变动
More examples
A mother's ears are attuned to even the slightest variation in her baby's breathing.
There have been wild variations in the level of spending.
They are studying the variation in carbon emissions.
There is a lot of variation between regions when it comes to average income.
The instruments measure variations in the earth's temperature.
C2 [ C ] something that is slightly different from the usual form or arrangement变种,变体;变化了的东西
[ C ] specialized music one of several short tunes that are based on the same simple tune, but are different from it and from the others变奏曲
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