Task: Translation
Input (Chinese): 但是，这些专家不是解决读者头脑中存在的知识之谜，而是解决与你所购买的东西有关的问题，而这些东西你并不理解。
Output (English): But instead of solving a mystery of knowledge a reader has in their head, these experts solve a problem related to something you have bought and do not understand.