建议你用的句子：
Could you please rephrase that question/topic?
Im not exactly sure what you mean ...
Im not exactly sure how to answer that question, but ...
Thats a rather difficult question, but ...
Im sorry, but I dont know much about ...
However, it might be possible that ...
Maybe I can answer your question by telling you about a personal experience I had.
Thats an interesting question ...
Let me see. Well,
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