var‧i‧a‧tion W2 AC / veərieɪʃ ə n $ ver- / 名词

1 [可数和不可数名词] a difference between similar things, or a change from the usual amount or form of something

variation of

White bread is really just a variation of French bread.

variation in

variations in the quality of the rugs

variation among

There is a great deal of variation among the responses.

variation between

The study concluded that the variation between the CD players was very small.

2 [可数名词] something that is done in a way that is different from the way it is usually done :

Most of his poems are variations on the theme of love.

3 [可数名词] one of a set of short pieces of music, each based on the same simple tune :

Bach’s Goldberg variations