Cách sử dụng
The word 'variation' means a change or difference in something. It can be used for different things like colors, sizes, shapes or characteristics. For example, there can be a variation in the color of flowers. Some flowers might be red and some might be yellow. Similarly, there can be a variation in the size of fruits. Some fruits may be big and some may be small. You can use the word 'variation' to describe changes or differences in many things.