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you are say : the price change of the cryptocurrency is not in the following four categories?
Science/technology/engineering/math!

That is my understanding of English have some wrong.
before, I Misunderstanding the engineering category has a price analysis.
Because when I talking about engineering,
Price analysis is often a very important part.
so, I Misunderstanding it.
I am sory!
I will pay attention later.
Thank you.

The is a very troublesome cognitive problem!

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