Assimilation simply means becoming different and the same. For example, some ethnic minorities have lived with the Han nationality for a long time and become the Han nationality. They think they are Han nationality, which shows that they have been assimilated.

Mathematical application, mainly should be to distinguish between similar and non-similar. It's best not to quote too deeply, because children may not understand. For example, numbers can't be added with Chinese characters. But with words, you can add up the numbers. For example, a me and a him, can be said to be two people.