Englishfor English speakers
variation
Noun
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A variation of something is the same thing, but changed a little bit.
The music is a variation of a Japanese song from the 1950s.
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Variation is the difference in amount, colour, size, etc. among many things.
There was a lot of variation in price among the stores.
method
Noun
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If you use a method to achieve a goal, then you use a planned process.
It is quite simple to use the method described in Section 7.2 to find the solution.
My preferred method for contacting friends overseas is on the Internet.