地道的翻译应该是：Sorry，i don't know much about the problem.
希望能帮到你，加油！
Sorry，I don't know this problem.
Sorry,I'm not so clear about this problem.
Sorry,I con't give you answer to this question.
Sorry,I'm not knowledgeble to answer.
Sorry,I don't know much about the problem.
Sorry,I can't understand the problem.
对不起,这个问题我不是很了解
Sorry ， i'm not so clear about this problem,~
希望帮到你，
Sorry,i do not understand this question
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